Comparison of ecotoxic effect of selenium on seed germination of wheat and paddy rice

Abstract

Abstract: Ecotoxic effects of selenium on the seed germination and seedling growth of wheat(Triticum aestivum L.) and rice(Oryza sativa L.) were studied by solution culture experiment.The results showed that low concentration of Se(under 0.5 mg·L^-1) could promote the seed germination of wheat and its seedling growth,while high concentration of Se(above 5 mg·L^-1) reduced the germination rate,the seedling growth and vigor and α-amylase activity markedly.The inhibition rates of seed germination indices of wheat were stronger than those of rice,among which the root elongation was the most sensitive.There was significantly positive correlation between the inhibition rate of seed germination and the concentration of Se in solution.The inhibition rate of root elongation of wheat seeds could be used as a biomarker to assess the ecological risk of selenium pollution.

Key words: vertical distribution, soil organic carbon, soil active carbon, soil carbon storage, Qinling Mountain.

CLC Number:

X171.5

SHAO Zhihui, LIN Kuangfei, XU Xiaoqing, ZHENG Li, XIANG Yaling. Comparison of ecotoxic effect of selenium on seed germination of wheat and paddy rice[J]. cje, 2005, (12): 1440-1443.

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