西北林学院学报2011，Vol.26Issue(5)：29-34,40,7.
不同生境中半红树植物抗氧化防御研究
Antioxidant Defenses of Mangrove Associates in Divergent Hatitats
摘要
Abstract
Changes of the anti-oxidative enzyme systems and reactive oxygen species (ROS) of Hibiscus tili-aceus, Thespesia populnea , Hernandia nymphii folia , Clerodendrurn inerme and Pluchea indica at divergent habitats ( intertidal and inland) were surveyed. The results showed that O2 production rate was typically higher at inland in leaves of H. Tiliaceus and C. Inerme than at intertidal populations , and an abrupt rise of H2O2 content occurred in the leaves of H. Nymphii folia at inland. Therefore, the activities of su-peroxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (POD) and glutathione reductase (GR) increased in the leaves of H. Tiliaceus, C. Inerme and H. Nymphii folia at inland, but with different patterns, T. Populnea rapidly triggered antioxidant defense at intertidal, H2O2 level declined correspondingly. P. Indica up-regulated antioxidant enzymes in ASC-GSH cycle, SOD, POD, GR, to scavenge active oxygen species, therefore, P. Indica maintained higher capacity to detoxify O2- production rate at inland. The strategies of antioxidant defense ware different among mangrove associate species at divergent habitats. In conclusion, activity of the anti-oxidative enzyme systems of mangrove associate species at inland was typically higher than at intertidal populations (especially POD, GR). Indicating that the selection pressure form environmental stress resulted in the responses of habitat adaptability of mangrove associate species. Mangrove associate leaves up-regulated antioxidant enzymes under various environmental stresses (high temperature, radiation and drough) at inland, thus limited environmental stresses induced lipid peroxide and membrane permeability, which contributed integrity maintenance and tolerance of mangrove associates.关键词
半红树；潮间带；陆生；抗氧化酶；活性氧Key words
mangrove associates/intertidal/ inland/the anti-oxidases/ reactive oxygen species (ROS)分类
农业科技引用本文复制引用
李妮亚,韩淑梅,陈坚,钟才荣,赵江艳,王春霞..不同生境中半红树植物抗氧化防御研究[J].西北林学院学报,2011,26(5):29-34,40,7.基金项目
海南省自然科学基金资助项目(310104) （310104）
海南师范大学植物学重点学科项目(HS-1-2011-07001). （HS-1-2011-07001）
