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Rice Flag Leaf Physiology, Organ and Canopy Temperature in Response to Water Stress

文献类型： 外文期刊

作者： Yan, Chuan 1 ; Chen, Heyun 1 ; Fan, Tianyun 1 ; Huang, Yifeng 1 ; Yu, Shouwu 1 ; Chen, Shanyu 1 ; Hong, Xiaofu 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou 310021, Zhejiang, Peoples R China

关键词： Organ and canopy temperature;Physiology of flag leaf;Rice;Water stress

期刊名称：PLANT PRODUCTION SCIENCE （ 影响因子：2.222； 五年影响因子：2.175 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Using two rice cultivars, the effect of severe, mild and no water stress, W3, W2 and W1, respectively, on flag leaf physiology, the ecological characteristics of canopy and organ temperatures were studied in 2008 and 2009. The grain yield was reduced under W3 due to decreased seed setting rate and 1000 grain weight but not under W2. Water stress had a significant effect on the flag leaf physiological characteristics along with the soluble sugar and amino proline content. Catalase and peroxidase activities, photosynthetic and transpiration rates, and stomatal conductance in W2 were significantly higher than in W3 and similar to those in W1. The organ and canopy temperatures were significantly higher in W3 than in either W1 or W2, and there was no significant difference between W1 and W2. This study clearly showed that water stress had a significant effect on leaf physiology, temperature of organs and canopy. Mild water stress (soil water potential maintained at -15- -20 kPa) could construct a population that is water-saving and resistant to heat stress. This facilitates access to a high yield as well.

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