Physiological and biochemical responses of Scytonema javanicum (cyanobacterium) to salt stress

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	Physiological and biochemical responses of Scytonema javanicum (cyanobacterium) to salt stress
	Tang, D.; Shi, S.; Li, D.; Hu, C.; Liu, Y.
刊名	JOURNAL OF ARID ENVIRONMENTS
	2007-11-01
卷号	71 期号:3 页码:312-322
关键词	antioxidative enzymes lipid peroxidation oxidative damage photosynthetic efficiency salt stress Scytonema javanicum
ISSN号	0140-1963
通讯作者	Liu, Y, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
中文摘要	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.
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.
学科主题	Ecology; Environmental Sciences
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Ecology ; Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	SUPEROXIDE-DISMUTASE ; GLUTATHIONE-REDUCTASE ; ACTIVE OXYGEN ; ANABAENA SP ; PHOTOSYNTHESIS ; TOLERANCE ; PLANTS ; DAMAGE ; PHOTOINHIBITION ; PEROXIDASE
收录类别	SCI
语种	英语
WOS记录号	WOS:000249611000004
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/8422]
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, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Tang, D.,Shi, S.,Li, D.,et al. Physiological and biochemical responses of Scytonema javanicum (cyanobacterium) to salt stress[J]. JOURNAL OF ARID ENVIRONMENTS,2007,71(3):312-322.
APA	Tang, D.,Shi, S.,Li, D.,Hu, C.,&Liu, Y..(2007).Physiological and biochemical responses of Scytonema javanicum (cyanobacterium) to salt stress.JOURNAL OF ARID ENVIRONMENTS,71(3),312-322.
MLA	Tang, D.,et al."Physiological and biochemical responses of Scytonema javanicum (cyanobacterium) to salt stress".JOURNAL OF ARID ENVIRONMENTS 71.3(2007):312-322.