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Effect of Mercury on the Growth and Physiological Function of Wheat Seedlings

Zhang Zhijie, Lu Qiufen and Fang Fang (Xi'an Institute of Metallurgy and Construction Engineering, Xi'an, Shaangxi Province)  
It has been observed that mercury depressed the germinant rate of wheat and its seedling growth, decreased its transpiration and chlorophyll content. Degrees of the influence was directly related with the mercury concentrations in wastewater and the content of it in the seedlings. In low concentration of mercury, the respiratory rate of seedlings increased, but it decreased or increased considerably in accordance with its high concentrations. Moreover, the respiratory rate in the growth and stages of the seedlings. The result showed that mercury caused a change of peroxidase isozyme pattern. The effects of mercury on wheat seedlings were a physiologicalreaction due to injury of mercury.
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