| Effect and Mechanism of Cold Tolerant Seed-Coating Agents on the Cold Tolerance of Early Indica Rice Seedlings |
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| 作者姓名： | ZHANG Hai-qing ZOU Ying-bin XIAO Guo-chao XIONG Yuan-fu |
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| 作者单位： | Agricultural College, Hunan Agricultural University, Changsha 410128, P.R.China |
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| 摘 要： | To better understand the effect and mechanism of cold tolerant seed-coating agents on the cold tolerance of rice seedlings, the physiological and biochemical effects of four cold tolerant seed-coating agents （HET, YKJ, YKZYJ, and the ABA seed coating agents） on two early indica rice varieties were studied under chilling stress. The results showed that the rice seedlings treated with cold tolerant seed-coating agents under chilling stress maintained dramatically higher root vigor, POD, CAT and SOD activities, and chlorophyll content, had lower MDA content and electrolyte leakage, and accumulated more soluble sugar and free proline, when compared with the control without the treatment, and finally showed lower plant injury rate. It was indicated that the cold tolerant seed coating agent improved the ability of rice seedlings in resisting to chilling stress. YKZYJ was ranked the first in terms of the efficiency in cold tolerance among the four cold tolerant seed-coating agents tested.
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| 关 键 词： | 水稻 早稻 种子处理 抗寒性 生理学 生物化学 作用机理 |
Effect and Mechanism of Cold Tolerant Seed-Coating Agents on the Cold Tolerance of Early Indica Rice Seedlings |
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| ZHANG Hai-qing ZOU Ying-bin XIAO Guo-chao XIONG Yuan-fu.Effect and Mechanism of Cold Tolerant Seed-Coating Agents on the Cold Tolerance of Early Indica Rice Seedlings[J].Agricultural Sciences in China,2007,6(7):792-801. |
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| Authors: | ZHANG Hai-qing ZOU Ying-bin XIAO Guo-chao XIONG Yuan-fu |
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| Institution: | Agricultural College, Hunan Agricultural University, Changsha 410128, P.R. China |
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| Abstract: | To better understand the effect and mechanism of cold tolerant seed-coating agents on the cold tolerance of rice seedlings,the physiological and biochemical effects of four cold tolerant seed-coating agents (HET, YKJ, YKZYJ, and the ABA seed coating agents) on two early indica rice varieties were studied under chilling stress. The results showed that the rice seedlings treated with cold tolerant seed-coating agents under chilling stress maintained dramatically higher root vigor,POD, CAT and SOD activities, and chlorophyll content, had lower MDA content and electrolyte leakage, and accumulated more soluble sugar and free proline, when compared with the control without the treatment, and finally showed lower plant injury rate. It was indicated that the cold tolerant seed coating agent improved the ability of rice seedlings in resisting to chilling stress. YKZYJ was ranked the first in terms of the efficiency in cold tolerance among the four cold tolerant seed-coating agents tested. |
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| Keywords: | rice cold tolerant seed-coating agent chilling stress physiology and biochemistry mechanism of cold tolerance |
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