Data/hora: 13/06/2024 15:14:32

Provedor de dados: | 61
País: | Brazil
Título: | Improved tolerance of wheat plants (Triticum aestivum L.) to drought stress and rewatering by the arbuscular mycorrhizal fungus Glomus claroideum: effect on growth and cell membrane stability
Autores: | Beltrano,José; Ronco,Marta G.
Data: | 2008-03-01
Ano: | 2008
Palavras-chave: | Mycorrhizae; Relative water content; Rewatering; Solute leakage; Water deficit.
Resumo: | The aim of this paper was to investigate the contribution of the arbuscular mycorrhizal fungus Glomus claroideum to drought stress tolerance in wheat plants grown under controlled conditions in a growth chamber, and subjected to moderate or severe water stress and rewatering. Water stress tolerance was determined through total dry weight, leaf relative water content, leakage of solutes and leaf chlorophyll and protein concentrations in mycorrhizal and non-mycorrhizal wheat plants. Total dry weight and leaf chlorophyll concentrations were significantly higher in mycorrhizal plants after moderate or severe water stress treatments compared with non-mycorrhizal ones. Electrolyte leakage was significantly lower in water-stressed inoculated plants. Compared to non-inoculated plants, leaf relative water content and total protein concentration of inoculated individuals increased only under severe water stress. When irrigation was re-established, mycorrhizal plants increased their total dry weight and leaf chlorophyll concentration, and recovered cell membrane permeability in leaves compared with non-mycorrhizal plants. In conclusion, root colonization by G. claroideum could be an adequate strategy to alleviate the deleterious effects of drought stress and retard the senescence syndrome in wheat.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000100004
Editor: | Brazilian Journal of Plant Physiology
Relação: | 10.1590/S1677-04202008000100004
Formato: | text/html
Fonte: | Brazilian Journal of Plant Physiology  v.20 n.1 2008
Fonte: | info:eu-repo/semantics/openAccess