Toxic effects of mercury on PSI and PSII activities, membrane potential and transthylakoid proton gradient in Microsorium pteropus
文献类型：期刊论文
| ; | |
| 作者 | Chunnuan Deng; Daoyong Zhang; Xiangliang Pan; Fengqin Chang; Shuzhi Wang |
| 刊名 | Journal of Photochemistry and Photobiology B: Biology
 ; Journal of Photochemistry and Photobiology B: Biology
|
| 出版日期 | 2013 ; 2013 |
| 卷号 | 127页码:1-7 |
| 关键词 | Photosystem I Photosystem I mercury membrane Potential proton Gradient aquatic Plant mercury membrane Potential proton Gradient aquatic Plant |
| 英文摘要 | Mercury (Hg) is one of the top toxic metals in environment and it poses a great risk to organisms. This study aimed to elucidate the toxic effects of Hg2+ on energy conversion of photosystem I (PSI) and photosystem II (PSII), membrane potential and proton gradient of Microsorium pteropus (an aquatic plant species). Contents of chlorophyll a, chlorophyll b and carotenoids, quantum yield and electron transfer of PSI and PSII of M. pteropus exposed to various concentrations of Hg2+ were measured. With increasing Hg2+ concentration, quantum yield and electron transport of PSI [Y(I) and ETR(I)] and PSII [Y(II) and ETR(II)] decreased whereas limitation of donor side of PSI [Y(ND)] increased. At ⩾165 μg L−1 Hg2+, quantum yield of non-light-induced non-photochemical fluorescence quenching in PSII [Y(NO)] significantly increased but quantum yield of light-induced non-photochemical fluorescence quenching [Y(NPQ)] decreased. Membrane potential (Δψ) and proton gradient (ΔpH) of M. pteropus were reduced significantly at 330 μg L−1 Hg2+ compared to control. Mercury exposure affected multiple sites in PSII and PSI of M. pteropus. ;Mercury (Hg) is one of the top toxic metals in environment and it poses a great risk to organisms. This study aimed to elucidate the toxic effects of Hg2+ on energy conversion of photosystem I (PSI) and photosystem II (PSII), membrane potential and proton gradient of Microsorium pteropus (an aquatic plant species). Contents of chlorophyll a, chlorophyll b and carotenoids, quantum yield and electron transfer of PSI and PSII of M. pteropus exposed to various concentrations of Hg2+ were measured. With increasing Hg2+ concentration, quantum yield and electron transport of PSI [Y(I) and ETR(I)] and PSII [Y(II) and ETR(II)] decreased whereas limitation of donor side of PSI [Y(ND)] increased. At ⩾165 μg L−1 Hg2+, quantum yield of non-light-induced non-photochemical fluorescence quenching in PSII [Y(NO)] significantly increased but quantum yield of light-induced non-photochemical fluorescence quenching [Y(NPQ)] decreased. Membrane potential (Δψ) and proton gradient (ΔpH) of M. pteropus were reduced significantly at 330 μg L−1 Hg2+ compared to control. Mercury exposure affected multiple sites in PSII and PSI of M. pteropus. |
| 语种 | 英语 ; 英语 |
| 源URL | [http://ir.gyig.ac.cn/handle/42920512-1/9435]  |
| 专题 | 地球化学研究所_环境地球化学国家重点实验室 |
| 作者单位 | 1.Key Lab of Plateau Lake Ecology & Global Change, College of Tourism and Geographic Science, Yunnan Provincial Key Laboratory of Plateau Geographical Process and Environmental Change, Yunnan Normal University, Kunming 650500, China 2.Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China 3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 4.University of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Chunnuan Deng,Daoyong Zhang,Xiangliang Pan,et al. Toxic effects of mercury on PSI and PSII activities, membrane potential and transthylakoid proton gradient in Microsorium pteropus, Toxic effects of mercury on PSI and PSII activities, membrane potential and transthylakoid proton gradient in Microsorium pteropus[J]. Journal of Photochemistry and Photobiology B: Biology, Journal of Photochemistry and Photobiology B: Biology,2013, 2013,127, 127:1-7, 1-7. |
| APA | Chunnuan Deng,Daoyong Zhang,Xiangliang Pan,Fengqin Chang,&Shuzhi Wang.(2013).Toxic effects of mercury on PSI and PSII activities, membrane potential and transthylakoid proton gradient in Microsorium pteropus.Journal of Photochemistry and Photobiology B: Biology,127,1-7. |
| MLA | Chunnuan Deng,et al."Toxic effects of mercury on PSI and PSII activities, membrane potential and transthylakoid proton gradient in Microsorium pteropus".Journal of Photochemistry and Photobiology B: Biology 127(2013):1-7. |
入库方式： OAI收割
来源：地球化学研究所
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