Duration of germination test of Parapiptadenia blanchetii (Benth.) Vaz & M. P. Lima
DOI:
https://doi.org/10.14295/cs.v14.3997Abstract
Germination tests are essential tools in the characterization of seed lots. However, there is no prescription for conducting the germination test for Parapiptadenia blanchetii (Benth.). The information about the species is limited to taxonomic studies and distribution area. This study aimed to determine the duration of the germination test for P. blanchetii seeds, using segmented regression. The experiment was carried out in temperatures of 20, 25, 30 and 35 °C, and four replications of 25 seeds. The germination curve was adjusted by response-plateau regression models: linear segmented with plateau (LPM) and quadratic segmented with plateau (QPM). For germination, the QPM showed the best adjustment at 20 °C and 25 °C. However, at temperatures of 30 °C and 35 °C the performance of the two models was similar. For the formation of normal seedlings, the best fit of the data was in the QPM at temperatures of 25 °C and 30 °C, for the other temperatures the LPM showed better performance. The duration of germination tests depends on the germination criterion and the temperature. For germination tests, conducted at temperatures of 30 °C or 35 °C, for the criterion of root protrusion, a single count on the fourth day after sowing is recommended. To assess the formation of normal seedlings, it is suggested the first and second count, at six and nine days.
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Copyright (c) 2023 EDIMARA RIBEIRO DE SOUZA, MANUELA OLIVEIRA DE SOUZA , JIOVANA PEREIRA AMORIM SANTOS, EDVÂNIA DA SILVA CARVALHO, ANDREA VITA REIS MENDONÇA
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