Effect of 24-epibrassinolide on drought stress-induced changes in Chorispora bungeana

被引：66
|
作者：
Li, Y. H. [1 ,2 ]
Liu, Y. J. [1 ]
Xu, X. L. [1 ]
Jin, M. [1 ]
An, L. Z. [1 ]
Zhang, H. [1 ]
机构：
[1] Lanzhou Univ, Sch Life Sci, Minist Educ, Key Lab Arid & Pasture Agroecol, Lanzhou 730000, Gansu, Peoples R China
[2] Zhengzhou Normal Univ, Dept Life Sci, Zhengzhou 450044, Henan, Peoples R China
来源：
BIOLOGIA PLANTARUM | 2012年 / 56卷 / 01期
基金：
中国国家自然科学基金;
关键词：
antioxidative enzymes; brassinosteroids; chlorophyll; lipid peroxidation; membrane permeability; photosystem; proline; reactive oxygen species; LIPID-PEROXIDATION; OXIDATIVE STRESS; GLUTATHIONE-REDUCTASE; HYDROGEN-PEROXIDE; ASCORBIC-ACID; SALT STRESS; PHOTOSYNTHESIS; BRASSINOSTEROIDS; CHLOROPHYLL; PROLINE;
D O I：
10.1007/s10535-012-0041-2
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Brassinosteroids (BRs) have been proposed to increase the resistance of plants to drought stress. The effect of foliar application of 0.1 mu M 24-epibrassinolide (EBR) on chlorophyll (Chl) content, photosystem 2 (PS 2) photochemistry, membrane permeability, lipid peroxidation, relative water content (RWC), proline content, and the antioxidant system in drought-stressed Chorispora bungeana plants was investigated. The results showed that polyethylene glycol (PEG) induced water stress decreased RWC, Chl content and variable to maximum Chl fluorescence ratio (F-v/F-m) less in plants pretreated with EBR than in non-pretreated plants. In addition, lipid peroxidation, measured in terms of malondialdehyde content, membrane permeability and proline content in drought-stressed plants were less increased in EBR pretreated plants, while antioxidative enzyme activities and reduced ascorbate and glutathione contents were more increased in EBR pretreated than in non-pretreated plants. These results suggested that EBR could improve plant growth under drought stress
引用
收藏
页码：192 / 196
页数：5
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