花期干旱胁迫对籼稻近等基因系水分和光合生理的影响

doi:10.3864/j.issn.0578-1752.2013.07.019

摘要/Abstract

摘要： 【Objective】An indica near-isogenic rice lines were treated with drought stress at flowering stage to study water and photosynthetic physiology changes of flag leaf. By analyzing the relationships among agronomic phenotype characters, water and photosynthetic physiology changes and fertility of rice, the authors try to accumulate data for drought tolerance evaluation of rice.【Method】The rice materials were suffered with drought stress begin from heading of main shoot for 15 days, water and photosynthetic physiology parameters were measured after treatment.【Result】The results showed that the indica near-isogenic rice represented various drought tolerance, and there was no correlation between drought tolerance and agronomic phenotype characters, neither with physiological activities of rice under well watered condition. However, under drought stress at flowering stage, the correlation coefficient between drought resistance indexes and changes of water content of flag leaf, water potential of flag leaf, stomatal conductance of flag leaf were 0.614**, 0.514** and 0.541**, respectively. This indicates that rice drought tolerance has a correlation with changes of water content, water potential and stomatal conductance. In addition, except the correlation coefficient between drought resistance indexes and changes of Fv/Fm of flag leaf (0.470*), there was no correlation between rice drought tolerance and photosynthetic physiology.【Conclusion】In summery, the changes of water physiology parameters could be used as indicators for screening rice with drought tolerance.

关键词: 水稻 , 近等基因系 , 花期干旱胁迫 , 生理活性

Abstract: 【Objective】An indica near-isogenic rice lines were treated with drought stress at flowering stage to study water and photosynthetic physiology changes of flag leaf. By analyzing the relationships among agronomic phenotype characters, water and photosynthetic physiology changes and fertility of rice, the authors try to accumulate data for drought tolerance evaluation of rice.【Method】The rice materials were suffered with drought stress begin from heading of main shoot for 15 days, water and photosynthetic physiology parameters were measured after treatment.【Result】The results showed that the indica near-isogenic rice represented various drought tolerance, and there was no correlation between drought tolerance and agronomic phenotype characters, neither with physiological activities of rice under well watered condition. However, under drought stress at flowering stage, the correlation coefficient between drought resistance indexes and changes of water content of flag leaf, water potential of flag leaf, stomatal conductance of flag leaf were 0.614**, 0.514** and 0.541**, respectively. This indicates that rice drought tolerance has a correlation with changes of water content, water potential and stomatal conductance. In addition, except the correlation coefficient between drought resistance indexes and changes of Fv/Fm of flag leaf (0.470*), there was no correlation between rice drought tolerance and photosynthetic physiology.【Conclusion】In summery, the changes of water physiology parameters could be used as indicators for screening rice with drought tolerance.

Key words: rice , near-isogenic lines , drought stress during flowering stage , physiology activities

杨永杰, 张彩霞, 宋建, 熊杰, 王熹, 章秀福, 符冠富, 陶龙兴. 花期干旱胁迫对籼稻近等基因系水分和光合生理的影响[J]. 中国农业科学, 2013, 46(7): 1481-1491.

YANG Yong-Jie, ZHANG Cai-Xia, SONG Jian, XIONG Jie, WANG Xi, ZHANG Xiu-Fu, FU Guan-Fu, TAO Long-Xing. Effects of Drought Stress on Water and Photosynthetic Physiology Activities of Near-Isogenic Indica Rice Lines at Flowering Stage[J]. Scientia Agricultura Sinica, 2013, 46(7): 1481-1491.

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