Biologia plantarum 58:195-199, 2014 | DOI: 10.1007/s10535-013-0375-4

Effects of salicylic acid pre-treatment on cadmium and/or UV-B stress in soybean seedlings

X. M. Li1,*, L. J. Ma1, N. Bu1, Y. Y. Li1, L. H. Zhang2,*
1 College of Chemistry and Life Science, Shenyang Normal University, Shenyang, P.R. China
2 Environmental Science Department of Liaoning University, Shenyang, P.R. China

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.

Keywords: antioxidants; chlorophyll; fluorescence; Glycine max; net photosynthetic rate; oxidative stress; stomatal conductance; transpiration rate
Subjects: salicylic acid; cadmium; UV-B radiation; antioxidants; growth; chlorophyll content; chlorophyll a fluorescence; carotenoids; flavonoids; net photosynthetic rate; stomatal conductance; transpiration rate; superoxide dismutase; peroxidase; catalase; malondialdehyde; soybean

Received: January 22, 2013; Revised: July 16, 2013; Accepted: July 19, 2013; Published: March 1, 2014Show citation

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Li, X.M., Ma, L.J., Bu, N., Li, Y.Y., & Zhang, L.H. (2014). Effects of salicylic acid pre-treatment on cadmium and/or UV-B stress in soybean seedlings. Biologia plantarum, 58(1), 195-199. doi: 10.1007/s10535-013-0375-4.
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