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A comparative study of classical and biochemical endpoints for phytotoxicity testing of chlorobenzoic acids 被引量:1
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作者 LIPei-jun YINPei-jie +2 位作者 ZHOUQi-xing SHIXing-qun XIONGXian-zhe 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第3期526-528,共3页
The phytotoxicity of chlorobenzoic acids(CBAs) was studied and the biochemical endpoints' suitability and sensibility was evaluated. Two terrestrial plant species in the same family were exposed to different conce... The phytotoxicity of chlorobenzoic acids(CBAs) was studied and the biochemical endpoints' suitability and sensibility was evaluated. Two terrestrial plant species in the same family were exposed to different concentrations of CBAS and tested their germination according to the guideline of Organization for Economic Cooperation and Development(OECP, 1984). The results showed that CBA dose-inhibition rate of classical endpoint had the distinct linear relationship in the range of 10%—50% inhibition rate for root elongation(p<0.01), and the dose variances of CBAs had the greater influence on the inhibition rate of germination than on inhibition rate of root elongation. The CBA dose half effect concentration-inhibition rate of two antioxidant enzyme activity superoxide dismutase(SOD) and catalase (CAT) had the quadratic relationship, and CBA dose-inhibition rate of the peroxides(POD) activity had the linear relationship(p<0.05). Comparing the half effect concentration (EC_ 50) of two kinds of endpoints, the POD activity was more sensitive than classical endpoint, however, SOD and CAT activity were not sensitive in the experiment. 展开更多
关键词 inhibition rate antioxidant enzyme half effect concentration(EC_ 50) SENSIBILITY
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Effect of Rare Earth Elements on Quantity Growth of Crops 被引量:1
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作者 张自立 常江 +3 位作者 汪成胜 柴绍明 韩修明 李瑞 《Journal of Rare Earths》 SCIE EI CAS CSCD 2002年第4期299-301,共3页
The effects of rare earth on the growth of rice, rape and soybean in three kinds of soils were studied with the method supposed by Economic Co-operation and Development organization (OECD), and the EC50(median growth... The effects of rare earth on the growth of rice, rape and soybean in three kinds of soils were studied with the method supposed by Economic Co-operation and Development organization (OECD), and the EC50(median growth concentration)values were obtained. The inhibition of RE on the growth of rice and rape in red soil and on the growth of soybean in yellow fluvo-aquic soil is higher with stronger poison effects. Compared with other heavy metals such as Hg, Cd, Pb, As, the poison of RE on crops is weaker. 展开更多
关键词 rare earths relative growth quantity half effect concentration
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