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Position: Home > Articles > Effects of Phosphate Fertilizer on Cold Tolerance and Its Related Physiological Parameters in Rice Under Low Temperature Stress Journal of Northeast Agricultural University(English Edition) 2012,19 (4)

Effects of Phosphate Fertilizer on Cold Tolerance and Its Related Physiological Parameters in Rice Under Low Temperature Stress

作者：

Ligang Hou;Wenfu Chen;Guochen Zhao;Wenqi Ma;Qi Chen;Liwen Liang;Sun Hong-jia

单位：

Rice Research Institute, Shenyang Agricultural University, Shenyang 100866, China;Rice Research Institute, Shenyang Agricultural University, Shenyang 100866, China;Rice Research Institute, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, Jilin, China;Rice Research Institute, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, Jilin, Chin

关键词：

chilling;rice;cold tolerance;sensitive;tolerant cultivar;low temperature stres

摘要：

The study was designated to explore the physiological mechanism of cold tolerance enhanced by phosphate in rice. An experiment was conducted to investigate the effects of different levels of phosphate fertilizer on cold tolerance and its related physiological parameters in rice seedings (chilling-sensitive cv. Changbai 9 and chilling-tolerant cv. Jijing 81) under low temperature stress. At the same time, the identification of cold tolerance was conducted. Compared with the normal temperature treatment, the relative chlorophyll content, photosynthesis rate, Fv/Fm and qP decreased and index of unsaturated fatty acid increased in rice under low temperature stress. The effect of chilling-sensitive cultivars was more than that of chilling-tolerant cultivars, more phosphorus fertilizer properly improved seedling quality of rice, slowed relative chlorophyll content dropping degree of rice seeding, increased photosynthesis rate, Fv/Fm, qP and index of unsaturated fatty acids, and enhanced the ability to chilling-tolerant cultivars under low temperature. The effect on chilling-tolerant cultivars was significantly higher than that on chilling sensitive cultivars by applying more phosphorus fertilizer. Phosphate regulated photosynthetic physiology and membrane fluidity to reduce injury by low temperature, and increasd the cold tolerance capacity of rice.

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Effects of Phosphate Fertilizer on Cold Tolerance and Its Related Physiological Parameters in Rice Under Low Temperature Stress

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东北农业大学学报(英文版)

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