热带作物学报2018，Vol.39Issue(5)：858-866,9.DOI:10.3969/j.issn.1000-2561.2018.05.005
干旱胁迫下不同甘蔗品种叶片抗氧化酶活性和渗透调节物质含量的变化
Changes of Antioxidant Enzyme Activities and Contents of Osmotic Regulation Substances in Leaves of Different Sugarcane Varieties under Drought Stress
摘要
Abstract
Over 80％ of sugarcane is grown in poor upland field in China,and drought stress has become an important factor limiting the sugarcane production.Investigating the physiological mechanisms of sugarcane drought resistance is important to breed new drought resistant sugarcane varieties and develop drought resistant fanning technologies.In the present study,pot culture was used to grow two sugarcane varieties,drought resistant F172 and drought sensitive YL6,and different drought stress and re-watering treatments were applied at seedling and elongating stages,respectively.The relationships between the drought resistance and the activities of antioxidant enzymes and the contents of osmotic substances in different sugarcane varieties were investigated.The results showed that the activity of oxygen radical scavenging enzyme system including superoxide dismutase (SOD) and peroxidase,the activity of antioxidant protective enzyme catalase (CAT),and the contents of insoluble protein (ISP),soluble sugar (SS) in the leaves of the drought resistant variety F172 were significantly increased under drought stress,and the contents of malondialdehyde (MDA) and insoluble sugar (ISS) were relatively stable compared with the drought sensitive variety YL6.The oxygen radical scavenging enzyme system in the drought sensitive variety YL6 was lagged in response to drought stress with significant increases in MAD and ISS and decreases in SP and ISP in leaves.It indicates that the differences in the activities of antioxidant enzymes and the contents of osmotic regulation substances in the leaves are the physiological foundation of the difference in resistance of sugarcane varieties to drought stress.关键词
甘蔗/干旱胁迫/氧化酶/渗透调节物质Key words
sugarcane/drought stress/antioxidant enzyme/osmotic regulation substances分类
农业科技引用本文复制引用
Do Thanh Trung,李健,张风娟,邢永秀,杨丽涛,李杨瑞,Nguyen Thi Hanh..干旱胁迫下不同甘蔗品种叶片抗氧化酶活性和渗透调节物质含量的变化[J].热带作物学报,2018,39(5):858-866,9.基金项目
广西八桂学者、特聘专家专项(No.2013-03) （No.2013-03）
广西科技基地和人才专项(桂科AD17195100) （桂科AD17195100）
国家现代农业产业技术体系广西甘蔗创新团队专项(No.gjnytxgxcxtd-03-01) （No.gjnytxgxcxtd-03-01）
广西甘蔗遗传改良重点实验室项目(No.12-K-05-01). （No.12-K-05-01）
