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Effect of methyl jasmonate on SOD activity and membrane-lipid peroxidation in peanut seedlings during water stress

Pan Ruichi, Dou Zhijie, Ye Qingsheng

Department of Biology, South China Normal University. Guangzhou 510631,Guangdong

Abstract

The relative water content and permeability in leaves could be reduced when the seedlings were treated with MJ. After MJ treatment, the activites of superoxide dismutase and catalse in seedlings were found to be kept at higher levels than those of the control. Some new SOD isoenzymic bands were observed 2 days after MJ application. Ascorbic acid content was higher in MJ-treated seedling than the control. The level of malondialdehyde, substance toxic to the membrane, was decreased when the seedlings were treated with MJ during drought. MJ, therefore, could increase the levels of protective enzymes such as SOD and CAT which were able to remove superoxide and H_(2)O_(2), respectively, and eventually, protected the integrity of plasmamembrane from drought damage.

Key words: Peanut;Water stress;Methyl jasmonate;Superoxide dismutase;Malondialdehyde

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Citing This Article：

Pan Ruichi, Dou Zhijie, Ye Qingsheng. Effect of methyl jasmonate on SOD activity and membrane-lipid peroxidation in peanut seedlings during water stress. Acta Physiol Sin 1995; 47 (3): (in Chinese with English abstract).