安徽农业科学2011，Vol.39Issue(22)：13348-13353,6.
高温胁迫对水稻光合作用和叶绿素荧光特性的影响
Effect of High Temperature Stress on Photosynthesis and Chlorophyll Fluorescence of Rice
摘要
Abstract
[Objective]The aim was to study photosynthesis and chlorophyll fluorescence parameters of plant under high temperature stress. [Method] Two varieties of rice were treated at 30,35,40 and 45 ℃ for two hours, respectively, and then placed at 25 ℃ to resumed for 0,3,6 d, respectively. The photosynthesis and chlorophyll fluorescence parameters were measured. [ Result ] High temperature resulted in the reduction of net photosynthesis in two kinds of rice, whereas the net photosynthesis in 'Zhongyou 9801' decreased more than 'II you7' under same high temperature. The decrease of the net photosynthesis in ' II you 7' was reversible and that in ' Zhongyou 9801' was nonreversible. The decrease of net photosynthesis in ' H you 7' was primarily due to stoma limiting factor at 30-35 t whereas due to non-stoma limiting factor under 40 ℃. Non-stoma factor was the primary reason for the decrease of net photosynthesis in ' Zhongyou 9801'. Lower water loss resulted from rapid decrease of stomatal conductance and transpiration rate might be one of the reasons for thermotolerance of ' Iiyou 7'. High temperature resulted in significant increase of F0 and reduction of Pn,Fv/Fm,Qp and ETR in 'Zhongyou 9801' .which demonstrated that PSD reaction center had been destroyed or inactivated reversibly and then induced electron transfer delay and photochemistry reduction. [Conclusion] The increase of F0 and decrease of Pn, Fv/Fm, Qp and ETR in ' II you 7' were significantly weaker than in ' Zhongyou 9801'. Moreover, the above parameters resumed to control level after 6 d recovery. Higher stability and self-repair ability of PSQ were the important reason fors the thermotolerance of ' fl you 7'.关键词
水稻/高温胁迫/光合作用/叶绿素荧光Key words
Rice/High temperature stress/Photosynthesis/Chlorophyll fluorescence分类
农业科技引用本文复制引用
宋丽莉,赵华强,朱小倩,董根西,谢戎..高温胁迫对水稻光合作用和叶绿素荧光特性的影响[J].安徽农业科学,2011,39(22):13348-13353,6.基金项目
上海市教育委员会科研创新项目(11CXY60) （11CXY60）
上海应用技术学院教学改革项目“园艺专业实验教学方法改革初探—以植物生理学实验教学方法改革为例”. （）
