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Publication Type J
Authors Li, T., R. J. Liu, X. H. He and B. S. Wang
Title Enhancement of Superoxide Dismutase and Catalase Activities and Salt Tolerance of Euhalophyte Suaeda salsa L. by Mycorrhizal Fungus Glomus mosseae
Source Pedosphere
Language English
Author Keywords antioxidant enzymes isoenzyme malondialdehyde NaCl tolerance oxidative stress salinity tolerance oxidative stress plants halophytes diversity nacl inoculation alleviation quantify drought Agriculture
Abstract 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 halophytic plants is unclear. A pot experiment was conducted to determine whether salt tolerance of the C-3 halophyte Suaeda salsa was enhanced by the AM fungus Glomus mosseae. When 60-day-old S. salsa seedlings were subjected to 400 mmol L-1 NaCl stress for 35 clays; 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 NaCl stress. Our results suggested that G. mosseae increased salt tolerance by increasing SOD and CAT activities and forming SOD and CAT isoforms in S. salsa seedlings.
Author Address [Li Tao; Wang Bao-Shan] Shandong Normal Univ, Coll Life Sci, Key Lab Plant Stress Res, Jinan 250014, Peoples R China. [Liu Run-Jin] Qingdao Agr Univ, Inst Mycorrhizal Biotechnol, Qingdao 266109, Peoples R China. [He Xin-Hua] Univ Western Australia, Sch Plant Biol, Crawley, WA 6009, Australia. [He Xin-Hua] Michigan Technol Univ, USDA Forest Serv, No Res Stn, Houghton, MI 49931 USA. [He Xin-Hua] Michigan Technol Univ, Sch Forest Resources & Environm Sci, Houghton, MI 49931 USA. Wang, BS (reprint author), Shandong Normal Univ, Coll Life Sci, Key Lab Plant Stress Res, Jinan 250014, Peoples R China. bswang@sdnu.edu.cn
ISSN 1002-0160
ISBN 1002-0160
29-Character Source Abbreviation Pedosphere
Publication Date Apr
Year Published 2012
Volume 22
Issue 2
Beginning Page 217-224
Unique Article Identifier WOS:000302204200008
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