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学科主题: Biochemistry & Molecular Biology; Plant Sciences
题名: UV-B-induced Oxidative Damage and Protective Role of Exopolysaccharides in Desert Cyanobacterium Microcoleus vaginatus
作者: Chen, Lan-Zhou1; Wang, Gao-Hong2; Hong, Song1; Liu, An1; Li, Cheng1; Liu, Yong-Ding2
通讯作者: Hong, S, Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China
关键词: carbohydrate metabolism ; desert algae ; extracellular polymeric substances ; reactive oxygen species ; UV tolerance
刊名: JOURNAL OF INTEGRATIVE PLANT BIOLOGY
发表日期: 2009-02-01
DOI: 10.1111/j.1744-7909.2008.00784.x
卷: 51, 期:2, 页:194-200
收录类别: SCI
文章类型: Article
部门归属: [Chen, Lan-Zhou; Hong, Song; Liu, An; Li, Cheng] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China; [Wang, Gao-Hong; Liu, Yong-Ding] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Natural Science Foundation of China [30500068, 30570343]; National Hi-Tech Research and Development Program of China [2005AA601010-02-2]; Water Environment Research & Data Sharing Platform in the Middle Reaches of the Yangtze River [WERDSPMYR-0605]
类目[WOS]: Biochemistry & Molecular Biology ; Plant Sciences
研究领域[WOS]: Biochemistry & Molecular Biology ; Plant Sciences
摘要: UV-B-induced oxidative damage and the protective effect of exopolysaccharides (EPS) in Microcoleus vaginatus, a cyanobacterium isolated from desert crust, were investigated. After being irradiated with UV-B radiation, photosynthetic activity (Fv/Fm), cellular total carbohydrates, EPS and sucrose production of irradiated cells decreased, while reducing sugars, reactive oxygen species (ROS) generation, malondialdehyde (MDA) production and DNA strand breaks increased significantly. However, when pretreated with 100 mg/L exogenous EPS, EPS production in the culture medium of UV-B stressed cells decreased significantly; Fv/Fm, cellular total carbohydrates, reducing sugars and sucrose synthase (SS) activity of irradiated cells increased significantly, while ROS generation, MDA production and DNA strand breaks of irradiated cells decreased significantly. The results suggested that EPS exhibited a significant protective effect on DNA strand breaks and lipid peroxidation by effectively eliminating ROS induced by UV-B radiation in M. vaginatus.
英文摘要: UV-B-induced oxidative damage and the protective effect of exopolysaccharides (EPS) in Microcoleus vaginatus, a cyanobacterium isolated from desert crust, were investigated. After being irradiated with UV-B radiation, photosynthetic activity (Fv/Fm), cellular total carbohydrates, EPS and sucrose production of irradiated cells decreased, while reducing sugars, reactive oxygen species (ROS) generation, malondialdehyde (MDA) production and DNA strand breaks increased significantly. However, when pretreated with 100 mg/L exogenous EPS, EPS production in the culture medium of UV-B stressed cells decreased significantly; Fv/Fm, cellular total carbohydrates, reducing sugars and sucrose synthase (SS) activity of irradiated cells increased significantly, while ROS generation, MDA production and DNA strand breaks of irradiated cells decreased significantly. The results suggested that EPS exhibited a significant protective effect on DNA strand breaks and lipid peroxidation by effectively eliminating ROS induced by UV-B radiation in M. vaginatus.
关键词[WOS]: EXTRACELLULAR CARBOHYDRATE POLYMERS ; NOSTOC COMMUNE ; ANABAENA SP ; SOIL ALGAE ; STRESS ; POLYSACCHARIDES ; STABILIZATION ; DESICCATION ; INVOLVEMENT ; TOLERANCE
语种: 英语
WOS记录号: WOS:000262643200010
ISSN号: 1672-9072
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/7910
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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作者单位: 1.Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China

Recommended Citation:
Chen, Lan-Zhou; Wang, Gao-Hong; Hong, Song; Liu, An; Li, Cheng; Liu, Yong-Ding.UV-B-induced Oxidative Damage and Protective Role of Exopolysaccharides in Desert Cyanobacterium Microcoleus vaginatus,JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2009,51(2):194-200
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