Effects of salt stress on carbohydrate metabolism in desert soil alga Microcoleus vaginatus Gom.
文献类型：期刊论文
| 作者 | Chen, Lan-Zhou; Li, Dun-Hai; Song, Li-Rong; Hu, Chun-Xiang; Wang, Gao-Hong; Liu, Yong-Ding |
| 刊名 | JOURNAL OF INTEGRATIVE PLANT BIOLOGY
 |
| 出版日期 | 2006-08-01 |
| 卷号 | 48期号:8页码:914-919 |
| 关键词 | carbohydrate metabolism desert cyanobacteria exopolysaccharides (EPS) osmotic equilibrium salt stress |
| ISSN号 | 1672-9072 |
| 通讯作者 | Liu, YD, Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China |
| 中文摘要 | The effects of salt stress on carbohydrate metabolism in Microcoleus vaginatus Gom., a cyanobacterium isolated from desert algal crusts, were investigated in the present study. Extracellular total carbohydrates and exopolysaccharides (EPS) in the culture medium produced by M. vaginatus increased significantly during the growth phase and reached a maximum during the stationary phase. The production of extracellular carbohydrates also significantly increased under higher salt concentrations, which was attributed to an increase in low molecular weight carbohydrates. In the presence of NaCl, the production of cellular total carbohydrates decreased and photosynthetic activity was impaired, whereas cellular reducing sugars, water-soluble sugars and sucrose content and sucrose phosphate synthase activity increased, reaching a maximum in the presence of 200 mmol/L NaCl. These parameters were restored to original levels when the algae were transferred to a non-saline medium. Sodium and K+ concentrations of stressed cells decreased significantly and H+-ATPase activity increased after the addition of exogenous sucrose or EPS. The results suggest that EPS and sucrose are synthesized to maintain the cellular osmotic equilibrium between the intra- and extracellular environment, thus protecting algal cells from osmotic damage, which was attributed to the selective exclusion of cellular Na+ and K+ by H+-ATPase. |
| 英文摘要 | The effects of salt stress on carbohydrate metabolism in Microcoleus vaginatus Gom., a cyanobacterium isolated from desert algal crusts, were investigated in the present study. Extracellular total carbohydrates and exopolysaccharides (EPS) in the culture medium produced by M. vaginatus increased significantly during the growth phase and reached a maximum during the stationary phase. The production of extracellular carbohydrates also significantly increased under higher salt concentrations, which was attributed to an increase in low molecular weight carbohydrates. In the presence of NaCl, the production of cellular total carbohydrates decreased and photosynthetic activity was impaired, whereas cellular reducing sugars, water-soluble sugars and sucrose content and sucrose phosphate synthase activity increased, reaching a maximum in the presence of 200 mmol/L NaCl. These parameters were restored to original levels when the algae were transferred to a non-saline medium. Sodium and K+ concentrations of stressed cells decreased significantly and H+-ATPase activity increased after the addition of exogenous sucrose or EPS. The results suggest that EPS and sucrose are synthesized to maintain the cellular osmotic equilibrium between the intra- and extracellular environment, thus protecting algal cells from osmotic damage, which was attributed to the selective exclusion of cellular Na+ and K+ by H+-ATPase. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 学科主题 | Biochemistry & Molecular Biology; Plant Sciences |
| 类目[WOS] | Biochemistry & Molecular Biology ; Plant Sciences |
| 研究领域[WOS] | Biochemistry & Molecular Biology ; Plant Sciences |
| 关键词[WOS] | STABILIZATION ; DESICCATION ; SOLUTES ; SUCROSE ; CRUSTS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000239510200005 |
| 公开日期 | 2010-10-13 |
| 源URL | [http://ir.ihb.ac.cn/handle/152342/8892]  |
| 专题 | 水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China 2.Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Lan-Zhou,Li, Dun-Hai,Song, Li-Rong,et al. Effects of salt stress on carbohydrate metabolism in desert soil alga Microcoleus vaginatus Gom.[J]. JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2006,48(8):914-919. |
| APA | Chen, Lan-Zhou,Li, Dun-Hai,Song, Li-Rong,Hu, Chun-Xiang,Wang, Gao-Hong,&Liu, Yong-Ding.(2006).Effects of salt stress on carbohydrate metabolism in desert soil alga Microcoleus vaginatus Gom..JOURNAL OF INTEGRATIVE PLANT BIOLOGY,48(8),914-919. |
| MLA | Chen, Lan-Zhou,et al."Effects of salt stress on carbohydrate metabolism in desert soil alga Microcoleus vaginatus Gom.".JOURNAL OF INTEGRATIVE PLANT BIOLOGY 48.8(2006):914-919. |
入库方式： OAI收割
来源：水生生物研究所
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