Changes in antioxidant enzymes activity and oxidative stress by abscisic acid and salicylic acid in wheat genotypes
Changes in antioxidant enzymes activity and oxidative stress by abscisic acid and salicylic acid in wheat genotypes
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DOI：
10.1007/s10535-005-0048-z
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发表时间：
2005-12-01
影响因子：
1.5
通讯作者：
Meena, RC
中科院分区：
文献类型：
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作者：
Agarwal, S;Sairam, RK;Meena, RC
在营养液中加入PEG-6000，施加中度水分胁迫（-0.8MPa），于播后25 d和40 d对小麦基因型C306和Hira叶片喷施脱落酸（阿坝）和水杨酸（SA）。阿坝和SA增加了超氧化物歧化酶，抗坏血酸过氧化物酶，谷胱甘肽还原酶和过氧化氢酶的活性相比，未喷洒的对照植物。阿坝和SA处理降低过氧化氢和硫代巴比妥酸反应物质的含量，脂质过氧化的措施，相比未喷洒植物。抗氧化酶活性的增加和氧化胁迫的减少的有益效果反映在叶绿素和类胡萝卜素含量的增加，相对含水量，膜稳定性指数，叶面积和总生物量超过对照植物。较低浓度的阿坝（0.5 mM）和SA（1.0 mM）通常比较高浓度更有效。
Abscisic acid (ABA) and salicylic acid (SA) were sprayed on leaves of wheat genotypes C 306 and Hira at 25 and 40 d after sowing under moderate water stress (-0.8 MPa) imposed by adding PEG-6000 in nutrient solution. ABA and SA increased the activities of superoxide dismutase, ascorbate peroxidase, glutathione reductase, and catalase in comparison to unsprayed control plants. Both ABA and SA treatments decreased the contents of hydrogen peroxide and thiobarbituric acid reactive substances, a measure of lipid peroxidation, compared to unsprayed plants. The beneficial effect of increase in antioxidant enzymes activity and decrease in oxidative stress was reflected in increase in chlorophyll and carotenoid contents, relative water content, membrane stability index, leaf area and total biomass over control plants. The lower concentrations of ABA (0.5 mM) and SA (1.0 mM) were generally more effective than higher concentrations.