Comunicata Scientiae

Enhancing Genetic Diversity in Ornamental Chili Pepper Through Interspecific Crossing

2024-11-16T11:41:27-03:00

he observation of morpho-agronomic characteristics of ornamental chili pepper is essential to enhance diversity and get novel cultivars. Interspecific crossing is extremely effective in introducing a desirable character, resulting in a novel cultivar of agronomic relevance. This study aimed to identify the genetic diversity of crossing two open-pollinated ornamental chili pepper cultivars (‘Black Pearl’/Capsicum annuum & ‘Rawit Prentul’/Capsicum frutescens) as parents based on twenty morpho-agronomic characters (plant, flower, and fruit). The genetic diversity analysis in interspecific ornamental pepper offspring shows varying results from narrow to broad diversity. The broad genetic diversity in F1 Black Pearl x Rawit Prentul is found in replace with vegetative character, while the reciprocal cross (Rawit Prentul x Black Pearl) is seen in replace with vegetative and fruit characteristics. change The heatmap analysis identified the F1 into three major clusters while the dendogram analysis divided the F1 and F1 reciprocal into four major clusters. In F1 offsprings showed significantly negative and positive correlation between fruit color and morpho-agronomics character.

Priming of pumpkin seeds with salicylic acid in response to salt stress

2024-04-22T10:00:05-03:00

Salicylic acid is a phenolic hormone that influences the physiological and biochemical processes of plants, including resistance to biotic and abiotic stresses like salinity. The aim of this study was to evaluate the priming of pumpkin seeds with salicylic acid to mitigate salt stress during germination and early development. An entirely randomized design was used, in a 4 × 4 factorial scheme, using different doses of the phytohormone (100, 150, and 200 mg L⁻¹ and distilled water) and salinity levels (0, 2, 4, and 6 dS m⁻¹), with four replicates. Two genotypes, hybrid cv. Atlas and creole variety were used. The priming period of the seeds in salicylic acid was 8 hours. Then, the seeds were packed in germitest paper, soaked in saline solution, and placed in a germinating chamber. The initial germination count, germination percentage, and abnormal seedlings were evaluated. In a greenhouse, the emergence test was conducted with the seeds primed seeds. Saline solution was provided once a day. The percentage of emergence, emergence speed index, shoot and root length, and shoot and root dry mass were evaluated. The salt stress compromised seed germination and seedling development. The hybrid was sensitive to the salinity of 2 dS m⁻¹, while the creole variety tolerated salinity up to 2 dS m⁻¹. Priming of pumpkin seedlings with salicylic acid did not relieve salt stress during germination and early development.

Salt stress in okra cultivated under different planting systems and mulch

2024-03-05T08:06:21-03:00

Salt stress directly affects the cultivation of glycophyte plants by reducing water and nutrient uptake, which rapidly affects growth rate and assimilate accumulation. Therefore, a planting system involving transplantation or direct seeding in combination with a plant mulch on the soil can mitigate the detrimental effects of salt stress. In this context, the objective was to evaluate the growth and biomass accumulation of okra crop under salt stress in different planting systems, with and without plant mulch. The study was conducted in polyethylene pots, under full sunlight, in Redenção - CE. The treatments were arranged in a completely randomized design, in a 3×2×2 factorial scheme, representing three electrical conductivities of irrigation water (0.5, 1.5 and 2.5 dS m^-1), two planting systems (direct sowing and transplanting) and with and without plant mulch, with 6 replications. Leaf area, leaf number, root length, and dry weight of okra are negatively affected by salt stress (2.5 dS m^-1) even under soil protection and different cropping systems. Plant mulch reduced the effects of salts on all biomass variables in both cropping systems at an electrical conductivity of 1.5 dS m^-1.

Production of tamarind seedlings with organic substrates and application of swine biofertilizer

2024-07-09T08:14:48-03:00

The tamarind tree is a fruit tree that is quite resistant to tropical climates, making it easy to adapt to the Northeast. Substrates and biofertilizers, as they are organic materials and rich in micro and macronutrients, can enrich the soil for better cultivation of this plant. This research aimed to evaluate the growth of tamarind seedlings using different substrates and applying swine biofertilizer. The experiment was carried out from April to December 2023 at the Instituto Federal da Paraíba, Campus – Sousa-PB, adopting a completely randomized experimental design, with seven replicates, in a 7 x 2 factorial, referring to seven combinations of substrates, being: soil (control treatment), soil + cattle manure, soil + sheep manure, soil + chicken litter, soil + cattle manure + sheep manure, soil + cattle manure + chicken litter, soil + sheep manure + chicken litter, in the absence and presence of swine biofertilizer, totaling 98 experimental units. When the seedlings reached 40 days after sowing (DAS), the following were measured: seedling height (AM), stem diameter (DC), number of leaves (NF), root dry mass (MSR), shoot dry mass (MSPA), root to shoot ratio (RPA), and root length (CR). The best combination of substrates for seedling production was soil + cattle manure + chicken litter. The application of swine biofertilizer to tamarind seedlings promoted beneficial effects on stem diameter, thus making seedlings stronger and more resistant.

Germination and emergence of Astrocaryum aculeatum G. Mey. seeds subjected to desiccation

2024-07-09T08:22:06-03:00

Astrocaryum aculeatum is a palm tree of food and economic importance in the Amazon, but little information is found for its propagation. The objective of this study was to evaluate the performance of A. aculeatum seeds as a function of different moisture contents. The seeds were desiccated in a vacuum oven for different periods (0, 12, 24, 48, 72, and 96 hours), which resulted in seeds and embryos with different moisture contents; the resulting seed moisture contents (18.6%, 16.3%, 14.7%, 13.1%, 11.3%, and 9.6%, respectively) were considered treatments. The seeds were divided into two lots: one immediately evaluated, and another evaluated after 30 days of storage, for each seed moisture content. Seed quality was evaluated through germination and seedling emergence in a completely randomized design with four replications, using a split-plot arrangement. A. aculeatum seeds and embryos presented different moisture contents, which decreased from 18.6% to 9.6% in seeds and from 39.1% to 20.9% in embryos after the 96-hour desiccation. Decreases in seed moisture content down to 14.4% (31.0% in embryos) do not affect seed germination and seedling emergence and can be considered the critical moisture content below which seed physiological quality is compromised.

Cost and profitability of tomato cultivation in a protected environment with different spacings

2024-10-14T15:04:00-03:00

The tomato (Solanum lycopersicum L.) is a crop of great global economic importance due to its extensive cultivation area, in addition to generating employment and income. Climatic conditions are a major obstacle to production, requiring the use of a protected environment to produce quality fruits. Thus, the objective of this study was to analyze the cost and profitability of tomato cultivation in a traditional cultivation environment, covered with plastic film, and in a cultivation environment covered with polycarbonate and water film, using different spacings as a decision-making criterion. The experiment was conducted in the experimental area of Embrapa Agrossilvipastoril in the municipality of Sinop - MT. Different environments were used: greenhouse covered with 150 micron agricultural film and greenhouse covered with polycarbonate with the application of a water film for cooling and five spacings: 0.2; 0.3; 0.4; 0.5 and 0.6 m. Commercial productivity, total operating cost and profitability were evaluated. For both environments, the 0.2 and 0.3 m spacings showed greater productivity and consequently gross revenue, which was reflected in profitability parameters such as operating profit, gross margin, profitability index, leveling point and price. The other spacings tested did not show economic viability.

Multivariate and correlation network analyses in the selection of papaya cultivars in Mato Grosso, Brazil

2024-10-14T15:09:53-03:00

Papaya (Carica papaya L.) is among the most widely grown fruit species in the world and have significant economic importance in Brazil. However, most of the Brazilian production is concentrated in the Northeast and Southeast regions, limiting the potential expansion of this production chain. The objective of this study was to evaluate the performance of papaya cultivars from the Solo and Formosa groups in the state of Mato Grosso, Brazil, focusing on the combination of high-yield traits, fruit quality, and consumer acceptance through canonical variable analysis. The research was conducted in Tangará da Serra, MT, Brazil, using 11 papaya cultivars (Golden, Golden-THB, Aliança, UC14, UC16, UC12, Bela-Nova, Calimosa, Rubi-Incaper-511, T2, and Tainung-1). The cultivars showed significantly different results. Overall, they met the standards required by both national and international markets in terms of fruit physical appearance. Golden-THB (Solo group) showed the highest yield, while Golden had the highest ascorbic acid and beta-carotene contents. Rubi-Incaper-511 and UC16 were the most preferred by consumers, according to the sensory analysis.

Root development of pineapple seedlings cultivars inoculated with Fusarium guttiforme isolates

2024-11-16T11:22:18-03:00

Fusariosis caused by Fusarium guttiforme is responsible for losses in pineapple production in tropical regions. Information on potential damage to the root system at the early stages of plant development and the magnitude of damage caused by different F. guttiforme isolates is scarce. This study aimed to evaluate the genotype x isolate interaction in pineapple root development. The experimental trial was set up in a randomized block design with four replications in a 4 x 5 factorial arrangement (pineapple cultivars x F. guttiforme isolates + control). The following variables were evaluated at 90 days after inoculation: number of branches, root length, mean root diameter, total root perimeter, root surface area, shoot fresh mass, root fresh mass, shoot dry mass, and root dry mass. The data were subjected to analysis of variance and the means compared by Tukey’s test (p > 0.05). The cultivar Pérola showed a higher reduction in root development when inoculated with F. guttiforme. The cultivars Smooth Cayenne and BRS Vitória showed no changes in root development when inoculated, while ‘IAC Fantástico’ presented damage in the root system when inoculated with the isolates CF/UENF 512, CF/UENF 516, and CF/UENF 528. Pineapple plants may experience reductions in root length, number of branches, and, consequently, root volume when infected by F. guttiforme at the initial stage of development.

Pruning type and timing affect agronomic performance of blueberry plants grown in central Brazil

2024-03-05T07:29:48-03:00

Global blueberry production more than quadrupled between 2010 and 2022. One of the factors contributing to this production growth was the development of new cultivars with little or no chilling requirements, capable of thriving in tropical regions. Therefore, the objective of this study was to assess the growth and fruit yield of blueberry plants (Biloxi cultivar) subjected to different pruning types and timings in the Distrito Federal (DF), Central-West region of Brazil. The experiment was conducted in an open field, using a randomized complete block design with 3 replications and 10 plants per plot, totaling 480 plants. The plants were grown in pots using a fertigation system and were subjected to two types of pruning (severe pruning and regular pruning) in the different seasons of the year. The plants were evaluated for vegetative growth, fruit yield, number of fruits per plant, mean fruit weight, and fruit transverse and longitudinal diameters. The results showed that Biloxi blueberry can be grown under the climate conditions of the central region of Brazil, during the four seasons of the year, despite the tropical climate conditions and no occurrence of temperatures lower than 7.2 °C. Higher fruit yields were found when pruning was performed in winter or spring. Severe pruning resulted in higher fruit yields compared to regular pruning in winter. Summer and autumn pruning treatments reduced fruit yield; however, it is an alternative to extend the production window of this crop in Brazil.

Physicochemical characteristics of andisols and their correlation to potato yield based on land mapping units

2024-03-06T09:19:43-03:00

The high phosphate retention in andisol soil is often associated with a decrease in potato yield. Additionally, identification of the physical and chemical characteristics of andisols and their correlation to potato yield through soil mapping units (SMUs) is necessary to facilitate field surveys. Therefore, this study aimed to identify the physicochemical characteristics of andisols with a focus on available phosphorus (P) and the correlation to potato production based on SMUs. The experiment was conducted in Karo District, North Sumatra, Indonesia, from July 2022 to February 2023. A descriptive-analytical method was used by overlaying maps of slope, soil types, and altitude until 10 SMUs were selected that were planted with potatoes. Soil physicochemical properties were identified, while Pearson correlation analysis was performed on available-P and potato yield using IBM SPSS software. The results showed that the silt and clay fractions positively correlated with available-P in andisols. All soil physical characteristics were categorized as very weak to weak in supporting potato yield. A total of four SMUs including 1, 5, 8, and 10 were found to have lower available-P and very low to moderate correlations with soil pH, organic-C, C:N ratio, cation exchange capacity (CEC), as well as total-P. Based on the results, potato yield could increase by 1.765 and 0.380 tons ha-1 through the addition of organic-C and C:N ratio in Karo District. Therefore, soil amendment is required as an alternative to improve andisols soil.

In vitro root development under different IBA concentrations and culture media

2024-09-30T08:06:27-03:00

In vitro root cultivation is a method that provides high production and volume of roots quickly due to controlled environmental conditions. However, few studies report the in vitro development of excised roots for the most diverse plant species. The objective was to evaluate the in vitro development of excised mint (Menta piperita L.) and tomato (Solanum lycopersicum L.) roots under different concentrations of IBA and verify tomato roots' growth in different cultivation media. Segments of 2 cm of roots were incubated in DSD1 culture medium with concentrations of 0, 0.25, 0.5, 1.0, and 2.0 mg. L^-1 of AIB. Afterward, the 'M,' 'MSR', and DSD1 media were tested, supplemented with 1 mg L^-1 of IBA. The cultivation of tomato roots shows greater in vitro development than mint, and 1 mg L^-1 of IBA concentration was the most effective for tomatoes in DSD1 medium. The MSR medium resulted in a higher number and length of roots. Applying IBA increases the in vitro development of excised tomato roots compared to mint. For tomatoes, the concentration of 1 mg L^-1 of IBA stimulates the most significant development of the roots. The MSR medium has the highest development of tomato roots at 60 days after in vitro introduction.

Vegetative growth and fruit quality of 'Tahiti' acid lime grafted onto different rootstocks

2024-09-09T08:15:47-03:00

The production of 'Tahiti' acid lime in Brazil is currently limited to the northeastern and southeastern regions and research is required to identify compatible rootstocks in order to potentiate other producing areas and to meet the needs of the consumer and industrial markets. The aim of this study was to evaluate the physical characteristics during vegetative growth and the physicochemical attributes and quality of fruit produced by 'Tahiti CNPMF-02' acid lime grafted onto the twelve rootstocks ‘Cravo LCRSC’ and ‘LCR-03’ lime, citrandarins ‘CTRI’ and ‘CTRSD’, citrumelo ‘CTSW’, ‘Pear HTR-069’ orange, ‘Volkamer LVK×LCR- 038’ lemon, and ‘Sunki TSKC×CTSW-028', ‘TSKC×CTSW-041', ‘TSKC×(LCR×TR)-059', ‘TSKC×TRFD-003' and ‘TSKT’ tangerine. The randomized experimental design included 12 treatments with four repetitions and five plants per plot. The characteristics of the grafted plants were evaluated during vegetative growth at 3.5, 4.0 and 4.5 years of age, while fruit quality was assessed at maturity. All tested rootstocks were compatible with the scion 'Tahiti CNPMF 02' acid lime cultivated under the climate and soil conditions in the north of Mato Grosso state. The rootstocks ‘LCR-003', ‘CTRI’, ‘CTRSD’, ‘CTSW’ and ‘TSKC×CTSW-028' induced the greatest vertical growth, trunk diameter, crown volume and vigor in the grafted plants. The physicochemical characteristics and quality of the fruit produced by grafted plants of 'Tahiti CNPMF 02' acid lime met market expectations, except for the parameter total titratable acidity. The fruits produced by 'Tahiti CNPMF 02' acid lime grafted onto ‘CTRSD’, ‘TSKC×(LCR×TR)-059’, ‘LCR-003’, ‘TSKC×CTSW-041’, ‘TSKC×TRFD-003’, ‘LVK×LCR-038’ and ‘CTRI’ were the largest in terms of length and mass.

Winter pruning timing, development and quality of Cabernet Sauvignon in Southern Brazil

2024-07-09T08:17:48-03:00

The objective of this study was to evaluate the influence of winter pruning timing on phenology, productivity, and quality of Cabernet Sauvignon grapes and wines in 2022/2023 production cycle. The experimental design was randomized blocks, with 3 replications, each experimental unit consisted of 5 plants. The treatments involved four pruning timings (end of May, June, July and August). Phenology assessments were beginning and end of bud break, flowering, maturation and percentage of bud break. Production was evaluated by the number of clusters per plant, weight and size of clusters, productivity per plant and per hectare. The analyzes of must were pH, total acidity and soluble solids (°Brix). In wine, pH, total acidity, sugars, alcohol, volatile acidity and color were analyzed. In the end a wine sensory analysis was carried out. The results showed that the bud break of plants pruned early, in May, occurred at the same time as plants pruned in June and July. Early pruning resulted in lower productivity. The grape must from plants pruned late, in August, showed higher total acidity and lower values of soluble solids and sugars. Early pruning did not change the duration of the cultivar's phenological subperiods, nor did it bring forward the harvest in relation to the control. The different pruning times influenced productivity more than the composition of grapes and wines, indicating that it is possible to extend the pruning period.

Decomposition and nutrient release from shoot of legumes cover crops

2024-05-26T00:17:57-03:00

The cover crops can reduce soil exposure and erosion while enhancing nutrient cycling for crops. Effective implementation requires understanding how cover crops decompose and release nutrients to align with crop demand. This research assessed the decomposition rates and nutrient release of various legume residues commonly used as green manure or cover crops in agricultural systems. The study took place in a nutrient-deficient Red-Yellow Ultisol, using a split-plot design with different legume cover crop species: Crotalaria juncea, Crotalaria spectabilis, Cajanus cajan, Cajanus cajan (L.) Millsp), Dolichos lablab, Canavalia ensiformis and Mucuna aterrima as the main plots and six evaluation periods: 0, 30, 60, 90, 120, and 150 days after incorporation (DAI) as the subplots. Initial mass losses were observed in the first 60 days, followed by a slower decline over the study period. The order of nutrient accumulation in biomass was found to be: K > N > P > Ca > Mg. The Dolichos lablab species had the slowest decomposition rate, with a half-life of 43 days, while Cajanus cajan had the fastest, with a half-life of 65 days. Potassium reached its maximum by 30 DAI, indicating a rapid transfer to the soil. Nitrogen, P, and K contents decreased during different vegetative phases, highlighting the importance of proper timing for legume management. Hemp, Crotalaria spectabilis, Dolichos lablab, and Canavalia ensiformis were suitable for short-cycle vegetables due to rapid nutrient availability. Conversely, Cajanus spp., and Mucuna aterrima were better for extended soil coverage and slow nutrient release.

Fruit quality of 'Stanley' plums based on soil composition across diverse agro-ecological zones of Morocco

2024-05-18T20:35:15-03:00

The national production of plums, especially prunes, is strongly increasing, attracting attention in the local market. This study aims to assess the impact of soil chemical composition on the nutritional and physicochemical quality of plums of the variety ''STANLEY'' (Prunus Domestica L.) across diverse agro-ecological zones of Morocco. Through a preliminary survey of 21 growers in three distinct regions: Sais, Atlas and Oriental. Supplemented by sampling at eight locations in eastern and western Morocco, three categories of parameters were considered in this study: (1) parameters related to cultivation conditions, including climate, geographical structuring, plot size and planting age; (2) those providing information on physico-chemical properties, nutritional value and sugar content; (3) parameters related to soil quality. The surveyed farmers are proprietors of cultivated plots ranging from 6 to 70 hectares, with an average yield of 12T/ h. Notably, 28% of producers with recently established plantations (less than 10 years) have achieved yields exceeding 15T/h, indicating the fertility of trees at this stage of maturity. The findings affirm that soil fertility and soil amendment are the major factors contributing to high-quality fruit (large caliber, high Brix rate, intact product…). Additionally, this study highlights the significance of climate and irrigation in achieving the desired quality of plums.

Consumer liking of steamed green Chinese cabbage (Brassica rapa ssp. chinensis) cultivated in formulated vegetable waste-based organic hydroponic solutions

2024-05-13T23:52:00-03:00

Chinese cabbage or pak choy (Brassica rapa ssp. chinensis) is often consumed because of its high nutritional content and several health advantages. Due to their promotion as being healthier and more ecologically friendly, hydroponic vegetables have seen a recent spike in consumer interest. The production of Chinese cabbage involved the processing of the vegetable waste to create various hydroponic solution formulations (F1 = banana peels, eggshells, and bean sprouts; F2 = banana humps, onion peels, bean sprouts, and moringa leaves; F3 = moringa leaves, onion peels, and bean sprouts; and F4 = AB Mix solution). They were applied at concentrations of 600, 900, 1,200, and 1,500 parts per million. The aim of this study was to investigate the relationship between the type of hydroponic growth solutions and Chinese cabbage customer acceptance. As a result, using a hedonic test of consumer liking, a panel of 32 untrained individuals was asked to show their liking score on sensory attributes of Chinese cabbage. There was a significant difference in the color liking of Chinese cabbage as an effect of hydroponic solution formulation. However, both organic vegetable waste-based formulations did not statistically substantially affect consumer acceptance, which includes color, taste, flavor, texture, and overall liking. Ultimately, vegetable waste-based organic formulations can be used to produce Chinese cabbage that is as acceptable to customers as those prepared with inorganic AB-Mix solution.

Weed interference on organic carrot yield under different sowing methods

2024-06-10T11:54:27-03:00

Weed cause serious problems to vegetable cultivation, justifying the importance of studies on the interference of these plants in agricultural crops and management techniques in the context of organic production. From this perspective, this study aimed to evaluate the interference of weed on the yield of carrot grown under different sowing methods. The study was conducted at the Seridó Ecological Station in Rio Branco, Acre, Brazil. Control and coexistence experiments with weeds were set up in a split-plot design (5 x 2), with the plot corresponding to the coexistence or control periods: 15, 20, 25, 30, and 35 days after sowing, and the subplots corresponding to the sowing methods: direct seeding and water conditioning. Cultivation followed the recommendations for carrot and for the organic system. The harvest and evaluations were performed after 80 days by evaluating the biometric variables, the carrot yield, and the weed mass. The statistical analysis consisted of the test of assumptions followed by analysis of variance. Non-linear regression was used for the yield parameters by determining the interference periods. In contrast, linear regression was used for the other variables. Carrot coexistence with weeds reduced the conventional commercial yield by 75.73% and the organic commercial yield by 57.07%. Organic carrot cultivation should occur free of weed from 21 to 28 days. Water conditioning increased the organic carrot yield.

Tomato growth submitted to different soil water conditions using biostimulants

2024-06-10T11:52:42-03:00

Stress caused by water deficit is the main factor that decreases the productivity and quality of agricultural products. The objective of this study was to describe the morphological components of tomato plants subjected to different soil water conditions, as well as elucidate the use of the Seed+ and Crop+ biostimulants as an alternative to mitigate the effects of water deficit. The experiment was conducted in a completely randomized design with 12 treatments: control; Seed⁺; Seed⁺ + Crop⁺ 1x; Seed⁺ + Crop⁺ 2x; Crop⁺ 1x; Crop⁺ 2x, in soil water conditions at 50% and 100% soil water retention capacity (WRC). The plant height, leaf width and length, and stem diameter variables referring to the plants were assessed under both soil water conditions and by applying biostimulants. Data were organized and adjusted to the non-linear logistic regression model in order to describe the growth of tomato plants of the Santa Cruz Kada cultivar, which proved to be adequate to describe the growth and showed the best fit; in addition, the use of the Seed+ and Crop+ biostimulants helped in the morphology of tomato plants in both water conditions and reduced the damages caused by water deficit.

Conservation of Astrocaryum aculeatum seeds as a function of storage conditions of diaspores

2024-06-10T11:50:22-03:00

Information on the conservation of Astrocaryum aculeatum seeds can contribute to the sustainable management of this species, as commercial harvesting of its fruits is essentially extractivist. Thus, the objective of this study was to evaluate the germination and vigor of A. aculeatum seeds based on the storage conditions of diaspores (seeds with endocarp). A completely randomized experimental design was used, with a split-plot arrangement in time and four replications. Diaspores containing seeds with 21.1% moisture content were packaged and stored under the following conditions: a) permeable packaging in a natural environment (air temperature of 27.7 ± 1.5 °C and relative air humidity of 85.0 ± 11.9%); b) impermeable packaging in a natural environment; c) impermeable packaging in a cold chamber (18.0 ± 1.0 ºC and relative air humidity of 68.1 ± 6.2%). Seed moisture content, germination, dormancy, and mortality, percentage of seedling emergence, emergence speed index, and mean emergence time were evaluated after different storage periods (0, 2, 4, 6, and 10 months). Storing diaspores of A. aculeatum in impermeable packaging in a natural environment effectively preserve seed physiological quality for ten months. Contrastingly, storing diaspores in permeable packaging in a natural environment and in impermeable packaging in a cold chamber reduces seed physiological quality after two to three months of storage.

Mineral concentration in citrus peel flours

2024-04-22T10:17:26-03:00

Citrus fruits are known for their health benefits but managing processing waste is a challenge. Extracting bioactive compounds from these residues to create new products is promising, but mineral analysis is essential for food safety. The objective of this study was to analyze how the methodology for obtaining flour from sweet passion fruit peel, Tahiti lime, Murcott tangerine, and pearl pineapple influences the amounts of minerals Fe, Zn, Mn, Cu, Cr, and to determine the presence of these minerals in flours according to the defined limits. Maceration demonstrated a significant reduction in mineral content, such as iron, zinc, manganese, copper, and chromium, in the flours of lime and tangerine peels and passion fruit albedo. There was an increase in mineral levels after this process, such as zinc in passion fruit flavedo flour and manganese in tangerine and pineapple peels. Fe, Zn, Mn, Cu, Cr were respectively determined in 100g^-1in flours, from lime peel: 3,696mg; 1,273mg; 22,834mg, 0.422mg; 1104.945 μg; tangerine peel: 1,322mg; 2,560mg; 13,571mg; 0.236mg; passion fruit albedo: 8,596mg; 6,480mg; 76,003mg; 1,031mg; passion fruit flavedo 8,609mg; 3,363mg; 86,167mg; 2,317mg; in pineapple skin: 12,181mg; 0.704mg; 71,018mg; *mg; 2224.215 μg. Cr was not determined in the flours: albedo and flavedo from passion fruit, and tangerine and Cu from pineapple peel. Flours are sources of minerals but must be consumed with caution due to high quantities that can exceed the maximum tolerable intake limits.

Phenology and fruit quality of Surinam cherry trees in orchards: training system and seedling growth environment

2024-04-22T10:09:10-03:00

Surinam cherry (Eugenia uniflora L.) is a fruit tree species native to Brazil that produces fruits with potential for
food, cosmetic, and pharmaceutical industries. However, there is no technical information for growing Surinam
cherry in orchards. The objective of this study was to evaluate the phenology and fruit quality of Surinam cherry
trees grown from minicuttings, based on effects of shading during seedling formation and orchard training
systems. The experiment was carried out at the Federal University of Technology of Paraná (UTFPR), from 2018 to
2021. A randomized block experimental design with four replications was used, in a 5×3 factorial arrangement,
consisted of light intensities during seedling formation and orchard training systems, with varying experimental
units according to the analyses. Surinam cherry trees showed differences in the beginning and range of flowering
and fruit maturation according to the shading environment used for seedling formation and the orchard training
system. The fruit quality of Surinam cherry trees grown from minicuttings was not affected by the analyzed
factors.

Bioinsecticides based on neem (Azadirachta indica) and rue (Ruta graveolens) against Agrotis ipsilon

2024-04-22T10:04:08-03:00

Agrotis ipsilon is an important pest of several crops, where it causes damage to various parts of the plant such as stems, roots, leaves and tubers. Due to the growing demand for controlling these pests, there is a constant need for new products as the organisms acquire resistance after continuous contact. And this also generates a demand for bioinsecticides, which normally pose a lower health risk and are less harmful to the environment. Among the plants commonly used as insecticides are neem and rue, which have already been studied for several pests, although never together. This work aimed to determine the insecticidal activity of a natural insecticide derived from a mixture of neem and rue, commonly used in the region of Senhor do Bonfim-BA against A. ipsilon. Four different solutions were prepared, containing a) 20 neem leaves, 10 rue leaves and 5 A. ipsilon caterpillars, b) 20 neem leaves and 10 rue leaves, c) 20 neem leaves and d) 10 rue leaves. Water was tested as control. In the tests carried out, both the mixture popularly used in the region, containing neem, rue, and A. ipsilon caterpillars, as well as the solution containing only neem and rue had good results, killing all caterpillars in 72 hours. Isolated plant extracts did not obtain good results, only delaying the formation of pupae for neem extracts. Therefore, the mixture of Neem and Rue showed good insecticidal potential against A. ipsilon, with much higher activity than its isolated components.

Cobalt associated with potassium phosphite improves the post-harvest quality of mango cv. Palmer

2023-08-02T11:09:12-03:00

Mango is a highly perishable climacteric fruit with a short post-harvest period. Therefore, to extend shelf life, the mangoes were treated pre-harvest with a potassium phosphite solution (1.4 g/mL KH2PO4) and a control solution (0 g/mL KH₂PO) associated with different doses of cobalt (0; 48; 64; 80; 112 ml.plant-1) at a density of 1.30 g/mL. The work measured physical, chemical, and biochemical variables. Cobalt and potassium phosphite favored maintaining color and firmness and reduced the respiratory rate. The treatments significantly affected the chemical variables, reduced the soluble solids content, conserved ascorbic acid, and preserved the pH. Foliar application of cobalt and potassium phosphite at pre-harvest is an efficient technique for improving shelf life and maintaining mango quality during storage at room temperature.

Transformation of dolomite powder into value added fertilizer and its effect on growth and yield of tomato plant

2024-04-22T10:23:39-03:00

In Dolomite industry, various purposes have led to the generation of large amount of dolomite powder during mechanical processing. Dolomite is a rich source of Ca and Mg and XRF analysis showed the presence of certain micro and ultra micro plant nutrients in it. In the raw form these nutrients are not in easily plant accessible form. In the present research, dolomite powder was converted into easily plant accessible form and its value-added fertilizer is formed by mixing vermicompost with chemically converted dolomite powder. Three types of experiments- control (simple soil), control with compost (soil + vermicompost), and different percentages [X, 2X, 3X, 4X & 5X (X= 3%)] of value-added fertilizer with soil were performed on growth and yield of tomato plant. It was found that among all treatments, 5X showed maximum plant growth, crop yield with increased biomass.

Potassium dose and nutritional diagnosis of virus-free garlic

2024-04-22T10:20:54-03:00

Potassium (K) fertilizer application in garlic (Allium sativum L) is commonly based on current cultivars that are normally infected with phytopathogenic viruses. Garlic are being developed using meristem culture, but methods for K diagnosis in this type of garlic need to be validated. The objective was to evaluate methods for diagnosing nutritional status of virus-free garlic as a result of K doses through use of a specific K+ meter in soil solution and foliar sap, and to determine foliar K content and its relationship with yield and quality of bulbs. Treatments consisted of K₂O doses: 0, 50, 100, 250 or 500 kg ha^-1 established in 5 separate locations. In all locations, K₂O was applied in a single dose, before planting and incorporated in the 0-0.2 m layer. Response of garlic to K fertilization was low, with marketable yield being significant at a single location, with the highest marketable yield associated with 309 kg ha^-1 of K₂O. The K content of the soil solution and the K in the foliar sap increased with application of increasing K dose. Due to the low response of marketable yield of garlic to K fertilization, technologies of nutritional diagnosis of K was not efficient. Therefore, future studies should focus on different soil K concentrations to validate the sensibility of these technologies.

Morphology and initial development of Hancornia speciosa var speciosa in different substrates

2024-03-05T07:42:05-03:00

The impact of commercial demand on fruits explored through extractivism requires sustainable production strategies. Among these strategies is seedling propagation for reforestation and/or commercial plantations. The substrate and its impact on the quantity and quality of propagated plants are critical aspects of seedling propagation. Hancornia speciosa, commonly known as mangabeira, is a native fruit species that has been primarily explored through extractivism; thus, the goal of this study was to assess the early development of H. speciosa var. speciosa seedlings in different substrates using morphophysiological parameters. The seeds were processed and sown in six different substrates (sand, sand + powder coconut coir, sand + vermiculite, commercial substrate, commercial substrate + powder coconut coir, vermiculite, commercial substrate + vermiculite). To evaluate seedling development, the parameters First Emergence Count, Emergence Percentage, Emergence Speed Index, Total Seedling Size, Shoot Height, Root Length, Stem Diameter, Number of Leaves, and Shoot and Root Dry Massa were used. The pure vermiculite substrate performed best across all parameters, followed by the commercial substrate + powder coconut coir and the commercial substrate. As a result, substrates containing pure vermiculite are recommended for the propagation of H. speciosa var. speciosa, whereas substrates containing higher concentrations of sand, 50 to 100%, have a negative impact on seedling development for this variety.

Development of Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae) in tomato genotypes

2023-11-03T10:36:07-03:00

Tomato plants are the most widely cultivated fruit vegetables globally. The tomato leaf miner (Tuta absoluta) is the leading pest of this crop and can cause up to 100% loss of production. Therefore, the aim was to evaluate the development and resistance of antibiosis and non-preference types (antixenosis) for oviposition and feeding of T. absoluta in commercial tomato hybrids in choice and no-choice tests. For the experiments, an open-pollinated tomato cultivar was used as a control: ‘Santa Clara’ cultivar - susceptible - Italian type, along with eight commercial tomato hybrids were used: ‘Compack’ - salad type, ‘Caniati’ - Italian type, ‘Grazianni’ - Italian type, ‘Sweet Heaven’ - grape type, ‘Cascade’ - cherry type, ‘Ellen’ - salad type, ‘Bento’ - Italian type, and ‘Dominador’ - salad type, all having an indeterminate growth habit. According to the evaluated biological parameters (dendrogram and principal component analysis - PCA), the ‘Sweet Heaven’ hybrid showed a negative effect on the development of T. absoluta, with an increase in the duration of the larval, adult, and total phases, and low larval and total viability. The tomato hybrid ‘Cascade’ exhibited lower attractiveness for T. absoluta oviposition in no-choice tests. The tomato hybrids 'Sweet Heaven', 'Compack', and ‘Cascade’ showed a lower percentage of leaf area consumed. However, ‘Dominador’, ‘Santa Clara’, and ‘Ellen’ were the tomato genotypes that showed higher susceptibility to the development of T. absoluta, encompassing high larval, pupal, and total viability (larva-adult period). Concluding that the ‘Sweet Heaven’ hybrid negatively affected the development cycle of T. absoluta, while the ‘Cascade’ hybrid exhibited lower attractiveness for oviposition.

Development of scallion (Allium fistulosum L.) in substrate and homeopathic solutions of water hyacinth

2023-10-08T12:31:53-03:00

Scallion (Allium fistulosum) is a widely appreciated condiment in the Brazilian population, with significant economic and nutritional importance. Organic cultivation alternatives for this crop have been sought. From this perspective, this study aimed to evaluate the development of scallion in a substrate produced from the floating aquatic plant known as Water Hyacinth (Eichhornia crassipes), combined with soil or without it, with the application of homeopathic solutions. A completely randomized experimental design was used, with five replicates and six treatments, namely: Pure Water Hyacinth Substrate (SAP); Water Hyacinth Substrate with Homeopathic solution (SA+HA); Soil and Water Hyacinth Substrate (S+SA); Soil and Water Hyacinth Substrate with Homeopathic solution (S+SA+HA); Pure Soil (SP), and Soil with Homeopathic solution (S+HA). The following parameters were evaluated 60 days after planting: plant height in centimeters (AP), shoot diameter in millimeters (DP), and the number of shoots (NP). Analysis of variance revealed that plant height (AP) did not exhibit significant differences between substrates with or without the homeopathic solution. In contrast, substrates containing Water Hyacinth exhibited greater shoot diameter and number of shoots. This study showed that the Water Hyacinth substrate and homeopathic solution had promising results in the production of scallion seedlings when combined with soil.

Pre-harvest application of 2-(3-chlorophenoxy) propionic acid on pineapple plants

2023-09-04T08:25:58-03:00

The application of plant regulators such as exogenous auxin may provide effects on the translocation of carbohydrates to plant sinks, which may result in larger parthenocarpic fruits. The objective of the study was to evaluate the effects of the application of 2-(3-chlorophenoxy) propionic acid on the growth and quality of pineapple fruits. The experiment was carried out in a randomized block design. After floral induction, 2-(3-chlorophenoxy) propionic acid (CPA) was applied directly on the inflorescences at the following doses: 0 mg L-1; 40.0 mg L-1; 80.0 mg L-1; 120.0 mg L-1 and 160.0 mg L-1. Growth evaluations continued until 84 days after application, measuring fruit length (cm) with and without crown, crown length (cm), leaf D dry matter, fruit weight with and without crown (g), calculating if also, the absolute and relative growth rates. The post-harvest and quality characteristics of the fruits were also evaluated, as well as the harvest index. The application of CPA significantly reduces the length and weight of the crown of the fruits, however, the exogenous application of auxin provided an increase in the weight of the fruit. Regarding the post-harvest analysis, the application of CPA reduced the content of soluble solids in the fruit pulp.

Araceae Juss. used as an ornamental in Northeastern Brazil

2023-10-08T12:29:41-03:00

Araceae Juss. is widely used by the local population for various purposes, including food, mysticism and crafts. The aim of this study was to conduct a survey of Araceae species used in neighborhoods in Floriano, Piauí, and to classify these species based on their origin and habit. The research employed the "Rapport" technique and semi-structured interviews with residents of the of Floriano, Piauí, along with an analysis of the species use value. Nineteen species belonging to thirteen genera were documented, categorized into two main uses: ornamental and mystical. Species such as Aglaonema commutatum Schott, Dieffenbachia seguine Schott, Epipremnum aureum (Linden & André) G.S.Bunting and Zamioculca zamiifolia (Lodd.)Engl. exhibited the highest use value (0.016 each). These species are predominantly cultivated and are of exotic origin, with varying habits including climbing, epiphytic, hemiepiphytic, and herbaceous. Caladium bicolor, Monstera obliqua and Philodendron acutatum are species native to Brazil, found in the Northeast region. However, only while Philodendron acutatum was recorded on the flora of the state. Studies like this contributes to the dissemination of local knowledge and facilitate the exploration of the Araceae flora. Further research is warranted to identify additional use categories and to catalog Araceae species specific to the state, given the limited availability of studies on this plant family in the region.

Quality and postharvest conservation of sour passion fruit genotypes

2023-08-03T10:18:52-03:00

The postharvest phase is a limiting factor for climacteric fruits such as passion fruit due to rapid deterioration causing wilting and favoring the occurrence of pathogenic microorganisms. From this perspective, this study aimed to evaluate the postharvest quality of passion fruit genotypes cultivated in Mâncio Lima, Acre, as a function of the storage period after harvest. The experiment was set up and conducted at the Plant Science Laboratory of the Federal University of Acre, Campus Floresta. The experimental design was in randomized blocks, in a 10 x 5 factorial arrangement referring to 10 sour passion fruit genotypes and five postharvest evaluation periods, with three replications of six fruits. The fruits were evaluated for physical and chemical quality. Analysis of variance and polynomial regression were performed at 5% significance. The genotypes showed oscillations regarding the physical and chemical characteristics of the fruits depending on the storage time. All evaluated genotypes are recommended for cultivation. However, when harvested directly from the ground after detached from the plant, fruits must be stored for up to 10 days at room temperature.

Repeatability of quantitative characteristics in sweet orange through mixed-model methodology

2023-08-03T10:15:32-03:00

The objective was to estimate the repeatability coefficient of quantitative traits in multiple harvests of sweet orange, in order to infer the minimum number of evaluations necessary to identify superior genotypes of orange trees through the methodology of mixed models. The experiment was conducted in randomized blocks containing 55 sweet orange genotypes and three replications. The repeatability coefficients were estimated using the maximum residual likelihood method (REML) and the prediction of genotypic values using the best unbiased linear predictor (BLUP). The Selegen software was used to perform the statistical analysis. The average heritability of genotypes in eight seasons, individual and eight seasons repeatability, selection accuracy in one and eight seasons, repeatability determination coefficient, accuracy of permanent phenotypic values based on M years of assessment and efficiency of M assessments compared to situation where only one assessment is carried out. The predictive accuracy of the selection revealed a significant degree of certainty in the inferences made. Evaluation over six seasons can increase accuracy to 70% in selecting sweet orange genotypes for yield-related traits. For the prediction of average fruit mass, seven harvests are enough to obtain 80% accuracy.

Gas exchange in yellow passion fruit hybrids in the Semiarid region

2023-05-08T11:00:23-03:00

Agronomic characterization and exploitation of the genetic variability in plants of the Passiflora can reveal important genetic resources because the Passiflora species grown under semiarid conditions make important contributions to breeding. The aim of this work was to evaluate the vegetative and physiological characteristics of fifteen yellow passion fruit hybrids in semiarid conditions. The experiment was conducted at IF Baiano – campus Guanambi, Bahia, Brazil. The 15 treatments were 10 genotypes: H09-10; GP09-02; H09-02; H09-14; H09-07; H09-09; FOP09; GP09-03; H09-30; FOP08 from the Active Germplasm Bank of the Genetic Breeding Program of Embrapa Cassava and Fruits, and five commercial hybrids: FB200; FB300; BRS SC; BRGA; BRS Rubi. The treatments were arranged in a randomized block design, with three replications and five observational units per plot. Vegetative characteristics (main branch length, number of functional leaves, number of nodes, and number of flower buds) were measured at full vegetative development, 90 days after transplanting (DAT). Hybrid H09-10 is the earliest in flowering, physiologically more efficient in the morning, closes stomata in the afternoon, regulates transpiration, and has lower leaf temperature, higher photosynthesis rate, and more efficient water use. Gas exchanges and photosynthesis rates, at 300 DAT, vary between hybrids and reading times: photosynthesis is higher in the morning while transpiration is greater in the afternoon. The reduction in carboxylation efficiency is related to non-stomatal factors. Gas exchange variables of the genotypes tend to be directly correlated with the photosynthetically active radiation incident on the leaf

Quality of minimally processed ‘Monalisa’ apples with antioxidants and edible toppings

2023-03-21T18:43:58-03:00

Minimally processed fruits are an alternative to add value to products that are difficult to sell, in addition to facilitateconsumer consumption. The objective is to research pulp browning inhibition in a simulated commercialization of minimally processed ‘Monalisa’ apples, stored in a refrigerated environment. After being sanitized with sodium hypochlorite, the apples were cut and immersed in the following treatments: the control being sodium erythorbate (ES) + A (distilled water); ES + FM (cassava starch 3%); ES + AS (3% sodium alginate); ES + AM (6% waxy maize starch) and ES + AP (3% pine nut starch), all together with 1% calcium chloride. Afterwards, 10 slices were placed in a polyethylene tray, wrapped in stretchable PVC film and stored in a refrigerated chamber at 4 ºC ± 1 ºC and relative humidity of 90 - 95%. Phytochemical evaluations were performed at 0, 3, 6 and 9 days of storage. The applied treatments maintained fruit quality. The treatment with cassava starch and pine nut starch were efficient in preserving the darkening of the fruit pulp on day 9. As for the waxy corn starch treatment, the enzyme activity was lower in the period of 0 and 6 days, maintaining quality and delaying darkening. The control sample (ES + A + CC) stood out during the 9-day period, as there was a decrease in the activity of polyphenoloxidase and peroxidase enzymes.