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Increase in unsaturated fatty acids in membrane lipids of Suaeda salsa L. enhances protection of photosystem II under high salinity

文献类型: 外文期刊

作者: Sui, N. 1 ; Li, M. 2 ; Li, K. 1 ; Song, J. 1 ; Wang, B. -S. 1 ;

作者机构: 1.Shandong Normal Univ, Coll Life Sci, Key Lab Plant Stress Res, Jinan 250014, Peoples R China

2.Shandong Acad Agr Sci, Jinan 250100, Peoples R China

关键词: chlorophyll;salt stress;unsaturated fatty acids.;membrane lipid;photosystem;Suaeda salsa;Internet resource.

期刊名称:PHOTOSYNTHETICA ( 影响因子:3.189; 五年影响因子:3.38 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: In order to examine the possible role of unsaturated fatty acids in photosynthesis of halophytes under high salinity, the effect of salinity on plant growth, chlorophyll (Chl) content, photochemical efficiency of PSII, membrane lipid content and fatty acids composition of a C euhalophyte Suaeda salsa L. was investigated. Salt stress induced a slight increase of the maximal photochemical efficiency of PSII (Fv/Fm), actual PSII efficiency (EPSII), Chl a content and Chl a/b ratio. The unsaturated fatty acid content also increased under salt stress. The proportion of MGDG, DGDG, SQDG, and PC decreased, while the proportion of PG increased from 10.9% to 26.9% under salt stress. These results suggest that S. salsa displays high resistance to photoinhibition under salt stress and that increased concentration of unsaturated fatty acids in membrane lipids of S. salsa enhances the tolerance of photosystem II to salt stress.

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