光照状况对光抑后的恢复和活性氧清除系统的影响  

Effect of Light Regime after Photoinhibition on Recovery of Photosynthetic Rate and Scavenging System of Active Oxygen

作　　者：傅春霞[1] 谭秀云[1] 顾行影 李黄振[1] 聂毓琦[1] 

机构地区：[1]江苏省农业科学院农业生理遗传生理研究所

出　　处：《江苏农业学报》1990年第S2期16-23,共8页Jiangsu Journal of Agricultural Sciences

基　　金：农业部05-01-01项目资助课题

摘　　要：用水稻品种牛脚扁糯、Mars和02428研究光抑后的光照状况对光合速率恢复和活性氧清除系统的影响。结果看出,恢复过程需要光,恢复前给以短期黑暗再照光,对恢复有促进作用。在800μE.m^(-2)s^(-1)光强以下,恢复的初期速度随光强水平的提高而增加。在光抑和恢复过程中,活性氧清除系统的变化与光合速率呈相反的趋势。品种间清除活性氧所依赖的主要途径有差异,并且光合速率恢复速度也有很大不同。To study the mechanism of photosynthesis recovery from photoinhibition and the differences a-mong rice varieties, three varieties with different sensibility to photoinhibition were used . The rate of photosynthesis for leaves of the same physiological age was measured under controlled light and temperature conditions. In the first experiment (Fig. 1) ,it was found that light was required during recovery after photoinhibition. Moreover,the recovery was accelerated if a short-term dark was given in the course. The second experiment (Fig. 2)showed that the initial rate of recovery was increased with rising light intensities. Under higher light intensities(800. 600. 400μE. m^-2s^-1)the rate of photosynthesis reached the maximum earlier and then dropped,while under lower light intensities (200, 110μE. m^-2s^-1),the rate continued rising. In the third experiment (Fig. 3), the trend of change in the scavenging system of active oxygen was found to be contrary to that in the photosyn-thetic rate (Pn)during the process of photoinhibition and recovery. Significant differences in recovery rates were found among varieties.

关 键 词：光合作用 恢复 活性氧清除系统 水稻品种 

分 类 号：S[农业科学]