作物学报2016，Vol.42Issue(4)：574-582,9.DOI:10.3724/SP.J.1006.2016.00574
水稻光氧化突变体812HS的光合和抗氧化特性
Characteristics of Photosynthesis and Antioxidation in Rice Photo-oxidation Mutant 812HS
摘要
Abstract
To reveal the physiological mechanism of leaf photo-oxidation in a rice mutant 812HS, we compared and analyzed differences of photochemical activity, antioxidative enzyme activities between 812HS and its wild type 812S grown in the field. Results showed that chlorophyll content, PSII activity, photophosphorylation activity, net photosynthetic rate (Pn) and antioxida-tive enzymes activities as well as active oxygen contents in 812HS were similar to those in 812S before exposed to high intensity of sunlight. However, all above indexes were affected by a period of high intensity of sunlight. The decreased degree of chloro-phyll content, PSII activity, non-cyclic photophosphorylation (NCPS) activity and Pn in 812HS were significantly higher than those in 812S. Besides, high intensity of sunlight led to a lower increase rate of POD and CAT activities in 812HS. Therefore, the contents of O2܋ , H2O2, and MDA in 812HS became higher than those in 812S. The result implied that the leaf photo-oxidation of mutant 812HS mainly results from higher sensitivity of PSII activities and lower CAT, POD activities under high intensity of sunlight.关键词
光氧化/光化学活性/抗氧化酶活性Key words
Photo-oxidation/Photochemical activity/Antioxidative enzyme activity引用本文复制引用
徐金刚,吕川根,刘莉,吕春芳,马静,夏士健,陈国祥,高志萍..水稻光氧化突变体812HS的光合和抗氧化特性[J].作物学报,2016,42(4):574-582,9.基金项目
本研究由国家自然科学基金项目(31271621),江苏省普通高校自然科学研究计划(14KJB180011),江苏高校优势学科建设工程(PAPD),江苏省自然科学基金项目(BK20140916)和江苏省现代作物生产协同创新中心共同资助。This study was supported by the National Natural Science Foundation of China (31271621), Natural Science Research of Jiangsu Higher Education Institutions (14KJB180011), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Natu-ral Science Foundation of Jiangsu Province (BK20140916), and Jiangsu Collaborative Innovation Center for Modern Crop Production （31271621）
