Proline and ions accumulation in four Passiflora species under water-saline stress

  • Alejandro Hurtado Salazar Universidad de Caldas
  • Danielle Fabiola Pereira da Silva Universidade Federal de Viçosa
  • Nelson Ceballos-Aguirre Universidad de Caldas
  • John Ocampo Universidad Nacional de Colombia
  • Claudio Horst Bruckner Universidade Federal de Viçosa
Keywords: NaCl, abiotic stress, stress physiology, tolerance

Abstract

Water-saline stress is one of the factors limiting growth and crop production, with the induction of morphological, structural and metabolic changes in higher plants. This study aimed to evaluate the response of four species with ten accessions of Passiflora to saline stress and drought stress, and the accumulation of proline and content of cationic macronutrients and their relationships with sodium. The plants were grown under controlled conditions for seven months, watered with nutrient solution with additions of NaCl (100 mM) to achieve the desired conductivities (1.5, 2.5, 4.0, and 5.5 dS m-1) and constant substrate humidity of 100%, 66% and 33%. The concentrations of Na+, K+, Ca++, Mg++ and proline in the leaves were determined. Proline accumulation increased in salinized plants, especially in young leaves. Proline increase was evident in accessions tolerant and moderately tolerant to salinity. These results indicate that tolerance to salinity and water stress in Passiflora relates to an improved ability to exclude sodium and greater ability to accumulate proline for osmotic adjustment. The increased salinity of the nutrient solution increased sodium contents, relations Na+/Ca++, Na+/Mg++, Na+/K+, and decreased Ca++, Mg++ and K+ levels, reflecting the nutritional imbalance caused by progressive saline stress.

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Author Biographies

Alejandro Hurtado Salazar, Universidad de Caldas
Departamento de produccion agropecuaria
Danielle Fabiola Pereira da Silva, Universidade Federal de Viçosa
Departamento de Fitotecnia
Nelson Ceballos-Aguirre, Universidad de Caldas
Departamento de produccion agropecuaria
John Ocampo, Universidad Nacional de Colombia
Departamento de Ciencias Biologicas
Claudio Horst Bruckner, Universidade Federal de Viçosa
Departamento de Fitotecnia
Published
12-04-2018
How to Cite
Hurtado Salazar, A., Pereira da Silva, D. F., Ceballos-Aguirre, N., Ocampo, J., & Horst Bruckner, C. (2018). Proline and ions accumulation in four Passiflora species under water-saline stress. Comunicata Scientiae, 8(4), 570-580. https://doi.org/10.14295/cs.v8i4.2323
Section
Original Article