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学科主题: Marine & Freshwater Biology; Toxicology
题名: Elucidating the toxicity targets of beta-ionone on photosynthetic system of Microcystis aeruginosa NIES-843 (Cyanobacteria)
作者: Shao, Jihai1, 2; Xu, Yao3; Wang, Zhongjie1, 4; Jiang, Yongguang1, 4; Yu, Gongliang1; Peng, Xin1; Li, Renhui1
通讯作者: Li, RH (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China ; shaojihai@yahoo.com.cn ; reli@ihb.ac.cn
关键词: Microcystis aeruginosa ; Photosynthesis ; Gene expression ; Chlorophyll a fluorescence
刊名: AQUATIC TOXICOLOGY
发表日期: 2011-07-01
DOI: 10.1016/j.aquatox.2011.03.014
卷: 104, 期:1-2, 页:48-55
收录类别: SCI
文章类型: Article
部门归属: [Shao, JH; Wang, ZJ; Jiang, YG; Yu, GL; Peng, X; Li, RH] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Shao, JH] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China; [Xu, Y] Nanjing Normal Univ, Coll Geog Sci, Dept Environm Sci & Engn, Nanjing 210046, Peoples R China; [Wang, ZJ; Jiang, YG] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: NSFC-JST[30821140542]; Hunan Provincial Natural Science Foundation of China[10JJ6045]; National Water Science and Technology[2009ZX07101-013-02]
类目[WOS]: Marine & Freshwater Biology ; Toxicology
研究领域[WOS]: Marine & Freshwater Biology ; Toxicology
摘要: In order to explore the potential targets of toxicity of beta-ionone on the photosynthetic system of Microcystis aeruginosa, the polyphasic rise in chlorophyll a (Chl a) fluorescence transient and transcript expression for key genes in photosystem II (PSII) of M. aeruginosa NIES-843 were studied. The EC(50) value of beta-ionone on M. aeruginosa NIES-843 was found to be 21.23 +/- 1.87 mg/L It was shown that beta-Ionone stress can lead to a decrease in pigment content of M. aeruginosa NIES-843 cells, and that carotenoids were more sensitive to beta-ionone stress than Chl a. The normalized Chl a fluorescence transients were slightly decreased at 6.67 and 10 mg/L beta-ionone, but significantly increased at 15, 22.5 and 33.75 mg/L There was no significant variation on transcript expression of psbA and psbO at a concentration of 6.67 mg/L beta-ionone. but they were down-regulated at 22.5 mg/L Ultrastructural examination by transmission electron microscopy indicated that the thylakoids were distorted, and the thylakoid membrane stacks began to collapse when M. aeruginosa NIES-843 was exposed to beta-ionone at a concentration of 22.5 and 33.75 mg/L Our results indicate that the reaction centre of PS II and the electron transport at the acceptor side of PS II are the targets responsible for the toxicity of beta-ionone on the PS II of M. aeruginosa NIES-843. (C) 2011 Elsevier B.V. All rights reserved.
英文摘要: In order to explore the potential targets of toxicity of beta-ionone on the photosynthetic system of Microcystis aeruginosa, the polyphasic rise in chlorophyll a (Chl a) fluorescence transient and transcript expression for key genes in photosystem II (PSII) of M. aeruginosa NIES-843 were studied. The EC(50) value of beta-ionone on M. aeruginosa NIES-843 was found to be 21.23 +/- 1.87 mg/L It was shown that beta-Ionone stress can lead to a decrease in pigment content of M. aeruginosa NIES-843 cells, and that carotenoids were more sensitive to beta-ionone stress than Chl a. The normalized Chl a fluorescence transients were slightly decreased at 6.67 and 10 mg/L beta-ionone, but significantly increased at 15, 22.5 and 33.75 mg/L There was no significant variation on transcript expression of psbA and psbO at a concentration of 6.67 mg/L beta-ionone. but they were down-regulated at 22.5 mg/L Ultrastructural examination by transmission electron microscopy indicated that the thylakoids were distorted, and the thylakoid membrane stacks began to collapse when M. aeruginosa NIES-843 was exposed to beta-ionone at a concentration of 22.5 and 33.75 mg/L Our results indicate that the reaction centre of PS II and the electron transport at the acceptor side of PS II are the targets responsible for the toxicity of beta-ionone on the PS II of M. aeruginosa NIES-843. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: CHLOROPHYLL-A FLUORESCENCE ; MYRIOPHYLLUM-SPICATUM ; SPIRULINA-PLATENSIS ; ALLELOPATHIC ACTIVITY ; PSII PHOTOCHEMISTRY ; DROUGHT STRESS ; PHOTOSYSTEM-II ; PLANTS ; GROWTH ; INHIBITION
语种: 英语
WOS记录号: WOS:000292949700006
ISSN号: 0166-445X
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/16377
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China
3.Nanjing Normal Univ, Coll Geog Sci, Dept Environm Sci & Engn, Nanjing 210046, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

Recommended Citation:
Shao, Jihai; Xu, Yao; Wang, Zhongjie; Jiang, Yongguang; Yu, Gongliang; Peng, Xin; Li, Renhui.Elucidating the toxicity targets of beta-ionone on photosynthetic system of Microcystis aeruginosa NIES-843 (Cyanobacteria),AQUATIC TOXICOLOGY,2011,104(40545):48-55
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