Low concentration of exogenous abscisic acid increases lead tolerance in rice seedlings |
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| Authors: | L. Zhao J. Xiong L. P. Li C. Zhu |
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| Affiliation: | (1) Department of Systems Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing -, 100085, P.R. China;(2) Chinese Academy of Meteorological Sciences, Beijing -, 100081, P.R. China;(3) Department of Systems Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing -, 100085, P.R. China |
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| Abstract: | The effects of exogenous abscisic acid (ABA) on lead tolerance in rice (Oryza sativa L.) seedlings were investigated. Pre-treatment with 0.1 g m3 ABA for 2 d restricted amount of Pb translocated from roots to shoots, decreased malondialdehyde and H2O2 contents in leaves, and alleviated Pb-induced decrease in plant growth and leaf chlorophyll content. Further, ABA pre-treatment adjusted leaf antioxidative enzyme activities (increased ascorbate peroxidase and catalase activities while decreased superoxide dismutase activity) and so alleviated oxidative stress. |
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