| 水稻对水稻土中甲磺隆结合残留的响应 |
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| 作者姓名： | LI Zhao-Jun WANG Hai-Zhen XU Jian-Ming WU Jian-Jun MA Guo-Rui |
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| 作者单位： | [1]Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou 310029 （China）. [2]Institute of Agricultural Resources and Regional Planning, Ministry of Agriculture Key Laboratory of Plant Nutrition and Nutrient Cycling, Chinese Academy of Agricultural Sciences, Beijing 100081 （China） |
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| 基金项目： | 国家自然科学基金;国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | Metsulfuron-methyl is one of the widely used sulfonylurea herbicides. However, approximately half of the applied metsulfuron-methyl may remain as bound residues in soil. To characterize the response of rice plants to residual metsulfuron-methyl in soil, the activities of acetolactate synthase （ALS）, superoxide dismutase （SOD）, peroxidase （POD）, and catalase （CAT） were investigated in two rice varieties that differed in susceptibility to the herbicide. Changes in the activity of these enzymes in leaves and roots of Xiushui 63, a sensitive rice variety, were greater than those in a resistant variety Zhenong 952. Irrespective of variety, changes in the enzyme activity were greater in the roots than in the leaves. The activities of ALS and CAT decreased, while the SOD activity increased with the increase in the amounts of bound residues of metsulfuron-methyl （BRM） in soil. The POD activity increased at the BRM level of 0.025 mg kg^-1, but decreased at the BRM level of 0.05 mg kg^-1. The results showed that the bound residues of sulfonylurea herbicides may affect metabolism of rice plants.
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| 关 键 词： | 水稻土 乙酰乳酸酶活性 过氧化酶 土壤学 |
| 收稿时间： | 16 January 2007 |
| 修稿时间： | 2007-01-162007-05-23 |
Response of rice varieties to bound residues of metsulfuron-methyl in a paddy soil |
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| LI Zhao-Jun,WANG Hai-Zhen,XU Jian-Ming,WU Jian-Jun,MA Guo-Rui.Response of rice varieties to bound residues of metsulfuron-methyl in a paddy soil[J].Pedosphere,2007,17(4):487-492. |
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| Authors: | LI Zhao-Jun WANG Hai-Zhen XU Jian-Ming WU Jian-Jun and MA Guo-Rui |
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| Institution: | Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou 310029 (China). E-mail: zjli@caas.ac.cn;Institute of Agricultural Resources and Regional Planning, Ministry of Agriculture Key Laboratory of Plant Nutrition and Nutrient Cycling, Chinese Academy of Agricultural Sciences, Beijing 100081 (China);Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou 310029 (China). E-mail: zjli@caas.ac.cn;Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou 310029 (China). E-mail: zjli@caas.ac.cn;Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou 310029 (China). E-mail: zjli@caas.ac.cn;Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou 310029 (China). E-mail: zjli@caas.ac.cn |
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| Abstract: | Metsulfuron-methyl is one of the widely used sulfonylurea herbicides. However, approximately half of the applied metsulfuron-methyl may remain as bound residues in soil. To characterize the response of rice plants to residual metsulfuron-methyl in soil, the activities of acetolactate synthase (ALS), superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were investigated in two rice varieties that differed in susceptibility to the herbicide. Changes in the activity of these enzymes in leaves and roots of Xiushui 63, a sensitive rice variety, were greater than those in a resistant variety Zhenong 952. Irrespective of variety, changes in the enzyme activity were greater in the roots than in the leaves. The activities of ALS and CAT decreased, while the SOD activity increased with the increase in the amounts of bound residues of metsulfuron-methyl (BRM) in soil. The POD activity increased at the BRM level of 0.025 mg kg-1, but decreased at the BRM level of 0.05 mg kg-1. The results showed that the bound residues of sulfonylurea herbicides may affect metabolism of rice plants. |
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| Keywords: | ALS activity bound residues CAT activity metsulfuron-methyl SOD activity |
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