Effect of Low Temperature on Antioxidant Enzyme System of Rice Leaves at the Booting Stage
In order to study the effect of low temperature on physiological characteristics and seed-setting rate of improved rice,cold-sensitive rice Tianfeng B(CG1),cold-tolerant rice Yixiang 1B(CG2)and improved Tianfeng B(CG3)were treated at 17 ℃ for 5 days at the booting stage.The effects of low temperature on the antioxidase enzyme system and yield of rice leaves at the booting stage were analyzed.The results showed that the seed-setting rate of cold-sensitive CG1 was low,only about 20％,the content of MDA and reactive oxygen species(ROS)in its body was increased,and the activities of POD,SOD and CAT in the antioxidant system were obviously lower,while the seed-setting rate of CG3 was comparable to that of cold-tolerant CG2,reaching more than 60％.Moreover,the enzyme activities and gene expression levels of POD,SOD and CAT in the antioxidant enzyme system were significantly increased in the CG2 and CG3.These results indicated that CG3 had a certain cold resistance,and the antioxidant enzyme system played an important role in resisting low temperature.
ricebooting stagelow temperatureantioxidant enzyme system
万方数据
维普
