Data/hora: 03/06/2024 08:15:47

Provedor de dados: | 91
País: | Brazil
Título: | Organic solutes in coconut palm seedlings under water and salt stresses
Autores: | Silva,Alexandre R. A. da; Bezerra,Francisco M. L.; Lacerda,Claudivan F. de; Miranda,Rafael de S.; Marques,Elton C.; Gomes-Filho,Enéas.
Data: | 2016-11-01
Ano: | 2016
Palavras-chave: | Cocos nucifera L.; Multiple stresses; Biochemical mechanisms.
Resumo: | ABSTRACT The objective of this study was to investigate the biochemical mechanisms associated with isolated and/or concurrent actions of drought and soil salinity in seedlings of coconut tree, through the accumulation of organic solutes (soluble carbohydrates, soluble amino N and free proline) in leaves and roots. The experiment, conducted in a protected environment, in Fortaleza, Brazil, in a randomized block design, in a split-plot arrangement, evaluated the effects of different levels of water stress (plots) by imposing distinct percentages of replacement of water losses through crop potential evapotranspiration - ETpc (20, 40, 60, 80 and 100%), associated with subplots consisting of increasing levels of soil salinity in saturation extract (1.72, 6.25, 25.80 and 40.70 dS m-1) provided by the soils collected in the Irrigated Perimeter of Morada Nova. Salinity did not change the concentration of organic solutes; however, there were increases in leaf and root levels of free proline in response to water stress, which contributes to the osmoregulation and/or osmoprotection of the species under adverse conditions of water supply.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001101002
Editor: | Departamento de Engenharia Agrícola  - UFCG
Relação: | 10.1590/1807-1929/agriambi.v20n11p1002-1007
Formato: | text/html
Fonte: | Revista Brasileira de Engenharia Agrícola e Ambiental  v.20 n.11 2016
Fonte: | info:eu-repo/semantics/openAccess