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《Guihaia》 2005-03
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Effects of Cr~(6+) and Se on the growth and physiology of rice seedling

SHI Gui-yu, CHEN Ming-mei ( College of Life Sciences, Guangxi Normal University, Guilin 541004, China )  
Effects of different concentration(0~200 μmol·L -1)of Chromium(Cr 6+)or Selenium(Se)and Cr 6++Se(Cr 6+100 μmol·L -1,Se 50 μmol·L -1)mixture on the growth and physiological function of the hybrid rice seedling were studied. The results showed that:(1)The seedling height,fresh weight and dry weight decreased,and the content of chlorophyll,activity of superoxide dismutase(SOD)and catalase(CAT)decreased,peroxidase(POD)and cell membrane permeability increased with Cr 6+concentration’s increase; (2)The growth of rice seedling was promoted at 50 μmol·L -1 of Se .But the growth was inhibited distinctly when the concentration of Se were increased(100~200 μmol·L -1); (3)Cr 6++Se mixture could alleviate the Cr 6+ toxicity,retard the inhibition of Cr 6+ to the increase of seedling height,increase chlorophyll content,and SOD,CAT activities,decrease POD activities and membrane permeability.
【CateGory Index】: S511
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