Enhancement of Superoxide Dismutase and Catalase Activities and Salt Tolerance of Euhalophyte Suaeda salsa L. by Mycorrhizal Fungus Glomus mosseae

作     者：LI Tao LIU Run-Jin HE Xin-Hua WANG Bao-Shan 

作者机构：Key Laboratory of Plant Stress ResearchCollege of Life SciencesShandong Normal UniversityJinan 250014(China) Institute of Mycorrhizal BiotechnologyQingdao Agricultural UniversityQingdao 266109(China) School of Plant BiologyUniversity of Western AustraliaCrawleyWA 6009(Australia) Northern Research StationUSDA Forest Service and School of Forest Resources and Environmental ScienceMichigan Technological UniversityHoughtonMI 49931(USA) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2012年第22卷第2期

页      面：217-224页

核心收录：

学科分类：0710[理学-生物学] 071010[理学-生物化学与分子生物学] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 09[农学] 0901[农学-作物学] 

基　　金：Supported by the National High Technology Research and Development Program (863 Program) of China (No. 2007AA091701) the National Natural Science Foundation of China (No. 30870138) 

主　　题：antioxidant enzymes isoenzyme malondialdehyde NaC1 tolerance oxidative stress 

摘      要：Arbuscular mycorrhizal （AM）-mediated plant physiological activities could contribute to plant salt tolerance. However, the biochemical mechanism by which AM fungi enhance salt tolerance of halophytie plants is unclear. A pot experiment was conducted to determine whether salt tolerance of the C3 halophyte Suaeda salsa was enhanced by the AM fungus Glomus rnosseae. When 60-day-old S. salsa seedlings were subjected to 400 mmol L-1 NaC1 stress for 35 days, plant height, number of leaves and branches, shoot and root biomass, and root length of G. mosseae-colonized seedlings were significantly greater than those of the nonmycorrizal seedlings. Leaf superoxide dismutase （SOD） activity at all sampling times （weekly for 35 days after salt stress was initiated） and leaf catalase （CAT） activity at 2 and 3 weeks after salt stress was initiated were also significantly enhanced in G. mosseae-colonized S. salsa seedlings, while the content of leaf malondialdehyde （MDA）, a product of membrane lipid peroxidation, was significantly reduced, indicating an alleviation of oxidative damage. The corresponding leaf isoenzymes of SOD （Fe-SOD, Cu/Zn-SOD1, and Cu/Zn-SOD2） and CAT （CAT1 and CAT2） were also significantly increased in the mycorrhizal seedlings after 14 days of 400 mmol L-1 NaC1 stress. Our results suggested that G. rnosseae increased salt tolerance by increasing SOD and CAT activities and forming SOD and CAT isoforms in S. salsa seedlings.