Effect of exogenous potassium on photosynthesis and antioxidant enzymes of rice under iron toxicity

被引：0
|
作者：
P. P. Gao
G. H. Zheng
Y. H. Wu
P. Liu
机构：
[1] Zhejiang Normal University,Key Laboratory of Botany
[2] Hangzhou Normal University,College of Life and Environmental Science
来源：
Russian Journal of Plant Physiology | 2014年 / 61卷
关键词：
iron stress; potassium; chlorophyll fluorescence; oxidation resistance;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A solution culture experiment was conducted to determine the effects of different potassium concentrations on the chlorophyll fluorescence and oxidation resistance of the Fe2+-tolerant rice (Oryza sativa L.) genotype Xieyou 9308 and the Fe2+-sensitive genotype IIyou 838 exposed to 250 mg/L of Fe2+. The minimal fluorescence, maximum fluorescence efficiency, maximum fluorescence, and non-photochemical quenching coefficient showed no significant changes. However, the photochemical quenching coefficient increased. Under 200 mg/L K+ concentration, the effects of Fe2+ stress decreased. Compared with the control group, chlorophyll content and peroxidase, superoxide dismutase, and catalase activities decreased, whereas MDA content increased under Fe2+ stress. Exogenous K+ alleviated Fe2+ toxicity in the test subjects compared with the control group. Overall, external K+ could alleviate the toxic effects of Fe2+ toxicity.
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页码：47 / 52
页数：5
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