Data/hora: 02/06/2024 18:50:38

Provedor de dados: | 94
País: | Brazil
Título: | Polyethylene glycol damages grafted citrus plants based on biometric, physiological,and biochemical responses
Autores: | Girardi,Eduardo Augusto; Brandão,Andréa Dias; Coelho,Rubens Duarte; Couto,Hilton Thadeu Zarate do; Buckeridge,Marcos Silveira; Mourão Filho,Francisco de Assis Alves.
Data: | 2018-01-01
Ano: | 2018
Palavras-chave: | Citrus limonia; Citrus paradisi x Poncirus trifoliata; Osmotic agent; Rootstock; Water deficit.
Resumo: | Abstract  Drought tolerance is a major trait for the selection of citrus rootstocks in breeding programs. PEG 4000 solution at 110 g L-1 (osmotic potential of -376 kPa) was used to evaluate biometric, physiological, and biochemical responses of grafted citrus plants in pots. ‘Valencia’ sweet orange plants grafted onto ‘Rangpur’ lime (drought tolerant) rootstock showed greater plant growth compared to that on ‘Swingle’ citrumelo (drought sensitive) rootstock, regardless of PEG-induced stress; however, biological responses to PEG were similar on both rootstocks. Plant dry weight, gas exchange, and leaf and root starch concentrations were reduced by PEG. Water potential at 2:00 p.m. and Fe and Mn leaf concentrations increased with severe phytotoxic symptoms. The results corroborate the limitation of PEG for assessing drought tolerance of citrus plants at the whole plant level.
Tipo: | Info:eu-repo/semantics/other
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000601001
Editor: | Sociedade Brasileira de Fruticultura
Relação: | 10.1590/0100-29452018071
Formato: | text/html
Fonte: | Revista Brasileira de Fruticultura  v.40 n.6 2018
Fonte: | info:eu-repo/semantics/openAccess