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题名: Damage to DNA caused by UV-B radiation in the desert cyanobacterium Scytonema javanicum and the effects of exogenous chemicals on the process
作者: Wang, Gaohong2; Deng, Songqiang1; Li, Cheng1; Liu, Yongding2; Chen, Lanzhou1, 2; Hu, Chaozhen1
通讯作者: Chen, LZ (reprint author), Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resources Chem & Environm B, Wuhan 430079, Peoples R China.
关键词: Desert soil cyanobacteria ; UV-B ; DNA damage ; ROS ; Herbicides ; Exogenous chemicals
刊名: CHEMOSPHERE
发表日期: 2012-07-01
DOI: 10.1016/j.chemosphere.2012.02.056
卷: 88, 期:4, 页:413-417
收录类别: SCI
文章类型: Article
部门归属: [Deng, Songqiang; Li, Cheng; Chen, Lanzhou; Hu, Chaozhen] Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resources Chem & Environm B, Wuhan 430079, Peoples R China; [Wang, Gaohong; Liu, Yongding; Chen, Lanzhou] Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Major Programs of Water Body Pollution Control and Remediation[2009ZX07104-005-02, 2008ZX07105-005]; Chinese Natural Science Foundation[30970446, 30500068, 30970688]; Chinese Manned Spaceflight Project
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
摘要: Radiation with UV-B increased the damage to DNA in Scytonema javanicum, a desert-dwelling soil microorganism, and the level of damage varied with the intensity of UV-B radiation and duration of exposure. Production of reactive oxygen species (ROS) also increased because of the radiation. Different exogenous chemicals (ascorbate acid, ASC; N-acetylcysteine, NAC; glyphosate, GPS; and 2-methyl-4-chlorophenoxy-acetic acid, MCPA-Na) differed in their effect on the extent of DNA damage and ROS production: whereas NAC and ASC protected the DNA from damage and resulted in reduced ROS production, the herbicides (GPS and MCPA-Na) increased the extent of damage, lowered the rate of photosynthesis, and differed in their effect on ROS production. The chemicals probably have different mechanisms to exercise their effects: NAC and ASC probably function as antioxidant agents or as precursors of other antioxidant molecules that protect the DNA and photosynthetic apparatus directly from the ROS produced as a result of UV-B radiation, and GPS and MCPA-Na probably disrupt the normal metabolism in S. javanicum to induce the leaking of ROS into the photosynthetic electron transfer pathway following UV-B radiation, and thereby damage the DNA. Such mechanisms have serious implications for the use of environment-friendly herbicides, which, because they can destroy DNA, may prove harmful to soil microorganisms. (C) 2012 Elsevier Ltd. All rights reserved.
英文摘要: Radiation with UV-B increased the damage to DNA in Scytonema javanicum, a desert-dwelling soil microorganism, and the level of damage varied with the intensity of UV-B radiation and duration of exposure. Production of reactive oxygen species (ROS) also increased because of the radiation. Different exogenous chemicals (ascorbate acid, ASC; N-acetylcysteine, NAC; glyphosate, GPS; and 2-methyl-4-chlorophenoxy-acetic acid, MCPA-Na) differed in their effect on the extent of DNA damage and ROS production: whereas NAC and ASC protected the DNA from damage and resulted in reduced ROS production, the herbicides (GPS and MCPA-Na) increased the extent of damage, lowered the rate of photosynthesis, and differed in their effect on ROS production. The chemicals probably have different mechanisms to exercise their effects: NAC and ASC probably function as antioxidant agents or as precursors of other antioxidant molecules that protect the DNA and photosynthetic apparatus directly from the ROS produced as a result of UV-B radiation, and GPS and MCPA-Na probably disrupt the normal metabolism in S. javanicum to induce the leaking of ROS into the photosynthetic electron transfer pathway following UV-B radiation, and thereby damage the DNA. Such mechanisms have serious implications for the use of environment-friendly herbicides, which, because they can destroy DNA, may prove harmful to soil microorganisms. (C) 2012 Elsevier Ltd. All rights reserved.
关键词[WOS]: ALLEVIATES OXIDATIVE DAMAGE ; ACETYL-L-CYSTEINE ; NITRIC-OXIDE ; ANTIOXIDANT ENZYMES ; GREEN-ALGAE ; NOSTOC SP ; STRESS ; CHLORELLA ; TOXICITY ; SYSTEM
语种: 英语
WOS记录号: WOS:000305266300007
ISSN号: 0045-6535
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/17007
Appears in Collections:水环境工程研究中心_期刊论文

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

Recommended Citation:
Wang, Gaohong; Deng, Songqiang; Li, Cheng; Liu, Yongding; Chen, Lanzhou; Hu, Chaozhen.Damage to DNA caused by UV-B radiation in the desert cyanobacterium Scytonema javanicum and the effects of exogenous chemicals on the process,CHEMOSPHERE,2012,88(4):413-417
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