Improved drought resistance in a wheat stay-green mutant tasg1 under field conditions

文献类型： 外文期刊

第一作者： Tian, F. X.

作者： Tian, F. X.;Gong, J. F.;Wang, G. P.;Wang, G. K.;Fan, Z. Y.;Wang, W.;Wang, G. P.

作者机构：

关键词： antioxidative defense system;chlorophyll degradation;chloroplast and thylakoid ultrastructures;drought stress;photosynthesis

期刊名称：BIOLOGIA PLANTARUM （ 影响因子：1.747； 五年影响因子：2.146 ）

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收录情况： SCI

摘要： We investigated the drought resistance of a wheat (Triticum aestivum L.) stay-green mutant tasg1 and its wild-type (WT) in field experiments conducted for two years. Drought stress was imposed by controlling irrigation and sheltering the plants from rain. Compared with the WT, tasg1 exhibited a distinct delayed senescence under both normal and drought stress conditions, as indicated by slower degradation of chlorophyll and decrease in net photosynthetic rate than in WT. At the same time, tasg1 mutants maintained more integrated chloroplasts and thylakoid ultrastructure than did WT plants under drought stress. Lower malondialdehyde content and higher antioxidative enzyme activities in tasg1, compared to WT, may be involved in the stay-green phenotype and drought resistance of tasg1.

分类号： Q94

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