Biologia plantarum 53:728-732, 2009 | DOI: 10.1007/s10535-009-0132-x
Low concentration of exogenous abscisic acid increases lead tolerance in rice seedlings
- 1 State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, P.R. China
- 2 College of Chemistry and Life Sciences, Lishui University, Lishui, P.R. China
- 3 China National Rice Research Institute, Hangzhou, P.R. China
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.
Keywords: APX; CAT; MDA; Oryza sativa L.; SOD; transpiration rate
Subjects: abscisic acid (ABA); ascorbate peroxidase; catalase; chlorophyll a,b; hydrogen peroxide; lead; malondialdehyde; Oryza sativa; rice; superoxide dismutase (SOD)
Received: September 27, 2007; Accepted: May 14, 2008; Published: December 1, 2009 Show citation
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