Eco-toxicological effects of selenium and its critical value on Oryza sativa

Abstract

Abstract: In a pot experiment with brown-yellow soil,this paper studied the effects of different concentration selenium on the growth and activated oxygen- scavenging system of Oryza sativa.The results showed that low concentration Se (<8 mg穔g^-1) had a promoting effect on the wheat biomass,chlorophyll a,chlorophyll a/b,and activated oxygen- scavenging system,while high concentration Se (>16 mg穔g^-1) was in adverse.Soil Se concentration had a significant correlation with root biomass,shoot biomass,chlorophyll a/b,MDA,SOD,CAT,POD.It was defined by the pot experiment that 10% inhibition rate of root or shoot biomass could be regarded as critical value,and the critical content of soil Se was estimated to be 21 mg穔g^-1.

Key words: Oryza sativa, Selenium pollution, Anti-oxidative enzymes, Ecological effect, Critical value

CLC Number:

X171.5

LIN Kuangfei, XU Xiaoqing, JIN Xia, SHAO Zhihui, XIANG Yaling . Eco-toxicological effects of selenium and its critical value on Oryza sativa[J]. Chinese Journal of Applied Ecology, 2005, 16(4): 678-682.

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