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学科主题: Ecology; Environmental Sciences
题名: Physiological and biochemical responses of Scytonema javanicum (cyanobacterium) to salt stress
作者: Tang, D.; Shi, S.; Li, D.; Hu, C.; Liu, Y.
通讯作者: Liu, Y, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
关键词: antioxidative enzymes ; lipid peroxidation ; oxidative damage ; photosynthetic efficiency ; salt stress ; Scytonema javanicum
刊名: JOURNAL OF ARID ENVIRONMENTS
发表日期: 2007-11-01
DOI: 10.1016/j.jaridenv.2007.05.004
卷: 71, 期:3, 页:312-322
收录类别: SCI
文章类型: Article
部门归属: Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China; Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Ecology ; Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
摘要: Scytonema javanicum (Kutz.) Born et Flah (cyanobacterium) is one of the species distributed widely in the crust of desert soils regularly subjected to severe water stress. To investigate the response of the species to salt stress, many physiological and biochemical parameters, including growth rate, ratio of variable fluorescence to maximum fluorescence (Fv/Fm), reactive oxidative species (ROS), malondialdehyde (MDA), catalase (CAT), and superoxide dismutase (SOD), were determined in culture. The results showed that 50 mM NaCl inhibited growth and Fv/Fm in the medium BG-110, and that the inhibition was maximum after 1-2 days' exposure to salt stress; 50 mM NaCl also increased the contents of ROS and MDA in treated cells, which suggests that salt stress may lead to oxidative damage and lipid peroxidation in the alga. Further, changes in the antioxidative enzymes SOD and CAT in the treated alga were consistent with changes in ROS and MDA at certain extent. These observations suggest that oxidative stress resulting from salt stress in S. javanicum could result in the production of antioxidative enzymes to counteract the oxidative damage, and the enzymes may contribute to the ability of S. javanicum to survive the adverse desert environment. (c) 2007 Elsevier Ltd. All rights reserved.
英文摘要: Scytonema javanicum (Kutz.) Born et Flah (cyanobacterium) is one of the species distributed widely in the crust of desert soils regularly subjected to severe water stress. To investigate the response of the species to salt stress, many physiological and biochemical parameters, including growth rate, ratio of variable fluorescence to maximum fluorescence (Fv/Fm), reactive oxidative species (ROS), malondialdehyde (MDA), catalase (CAT), and superoxide dismutase (SOD), were determined in culture. The results showed that 50 mM NaCl inhibited growth and Fv/Fm in the medium BG-110, and that the inhibition was maximum after 1-2 days' exposure to salt stress; 50 mM NaCl also increased the contents of ROS and MDA in treated cells, which suggests that salt stress may lead to oxidative damage and lipid peroxidation in the alga. Further, changes in the antioxidative enzymes SOD and CAT in the treated alga were consistent with changes in ROS and MDA at certain extent. These observations suggest that oxidative stress resulting from salt stress in S. javanicum could result in the production of antioxidative enzymes to counteract the oxidative damage, and the enzymes may contribute to the ability of S. javanicum to survive the adverse desert environment. (c) 2007 Elsevier Ltd. All rights reserved.
关键词[WOS]: SUPEROXIDE-DISMUTASE ; GLUTATHIONE-REDUCTASE ; ACTIVE OXYGEN ; ANABAENA SP ; PHOTOSYNTHESIS ; TOLERANCE ; PLANTS ; DAMAGE ; PHOTOINHIBITION ; PEROXIDASE
语种: 英语
WOS记录号: WOS:000249611000004
ISSN号: 0140-1963
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/8422
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.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Tang, D.; Shi, S.; Li, D.; Hu, C.; Liu, Y..Physiological and biochemical responses of Scytonema javanicum (cyanobacterium) to salt stress,JOURNAL OF ARID ENVIRONMENTS,2007,71(3):312-322
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