Effects of salicylic acid pre-treatment on cadmium and/or UV-B stress in soybean seedlings |
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| Authors: | X M Li L J Ma N Bu Y Y Li L H Zhang |
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| Institution: | 1. College of Chemistry and Life Science, Shenyang Normal University, Shenyang, 110034, P.R. China
2. Environmental Science Department of Liaoning University, Shenyang, 110036, P.R. China
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| Abstract: | The present study examined the effect of salicylic acid (SA) pre-treatment on soybean seedlings exposed to cadmium and/or UV-B stress. Dry mass, pigment content, net photosynthetic rate (PN), stomatal conductance (gs), and transpiration rate (E) were decreased by the Cd and/or UV-B stress. SA alleviated the adverse effects of Cd and/or UV-B on growth, pigment content, PN, and gs, but did not mitigate the inhibitory effect of Cd/UV-B on E, or that of Cd on chlorophyll fluorescence parameters. Cd and/or UV-B induced oxidative stress and increased lipid peroxidation that was significantly decreased by SA pre-treatment. The Cd and/or UV-B increased superoxide dismutase (SOD) activity, decreased peroxidase (POD) activity, and catalase (CAT) activity was mostly unaltered. SA might act as one of the potential antioxidants as well as a stabilizer of membrane integrity to improve plant resistance to the Cd and/or UV-B stress. |
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