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Salt tolerance of Microcoleus vaginatus Gom., a cyanobacterium isolated from desert algal crust, was enhanced by exogenous carbohydrates
Lanzhou Chen; Dunhai Li; Yongding Liu; Li, DH, Chinese Acad Sci, Inst Hydrobiol, 7 Donghu Nan Lu, Wuhan 430072, Peoples R China
2003
Source PublicationJOURNAL OF ARID ENVIRONMENTS
Volume55Issue:4Pages:645-656
AbstractMicrocoleus vaginatus isolated from a desert algal crust of Shapotou was cultured in BG-11 medium containing 0.2mol l(-1) NaCl or 0.2mol l(-1) NaCl plus 100mg l(-1) sucrose, extracellular polymeric substances (EPS) or hot water-soluble polysaccharides (HWP), respectively. Photosynthetic oxygen evolution rates, photosystem 11 activity (Fv/Fm) and dark respiration of NaCl-stressed cells were enhanced significantly by the added sucrose or EPS under salt stress conditions (0.2mol l(-1) NaCl). Compared with cells treated with salt alone, sodium contents in cells reduced significantly; the content of cellular total carbohydrate did not change, and intracellular sucrose, water-soluble sugar increased significantly following the addition of exogenous carbohydrates. Sucrose synthase (SS) activity of NaCl-stressed cells increased following the addition of sucrose, and sucrose phosphate synthase (SPS) activity of NaCl-stressed cells increased following the addition of exogenous sucrose, EPS or HWP compared with cells stressed with NaCl only. The results suggested that the extruded EPS might be re-absorbed by cells of M. vaginatus as carbon source, they could increase salt tolerance of M. vaginatus through the changes of carbohydrate metabolism and the selective uptake of sodium ions. (C) 2003 Elsevier Science Ltd. All rights reserved.
KeywordDesert Algal Crust Cyanobacteria Microcoleus Vaginatus Exogenous Carbohydrates Sucrose Synthase Sucrose Phosphate Synthase Salt Stress Osmotic Regulation
DepartmentChinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Subject AreaEcology ; Environmental Sciences
Indexed BySCI
WOS IDWOS:000185762500005
Citation statistics
Cited Times:34[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9632
Collection期刊论文
Corresponding AuthorLi, DH, Chinese Acad Sci, Inst Hydrobiol, 7 Donghu Nan Lu, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Lanzhou Chen,Dunhai Li,Yongding Liu,et al. Salt tolerance of Microcoleus vaginatus Gom., a cyanobacterium isolated from desert algal crust, was enhanced by exogenous carbohydrates[J]. JOURNAL OF ARID ENVIRONMENTS,2003,55(4):645-656.
APA Lanzhou Chen,Dunhai Li,Yongding Liu,&Li, DH, Chinese Acad Sci, Inst Hydrobiol, 7 Donghu Nan Lu, Wuhan 430072, Peoples R China.(2003).Salt tolerance of Microcoleus vaginatus Gom., a cyanobacterium isolated from desert algal crust, was enhanced by exogenous carbohydrates.JOURNAL OF ARID ENVIRONMENTS,55(4),645-656.
MLA Lanzhou Chen,et al."Salt tolerance of Microcoleus vaginatus Gom., a cyanobacterium isolated from desert algal crust, was enhanced by exogenous carbohydrates".JOURNAL OF ARID ENVIRONMENTS 55.4(2003):645-656.
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