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学科主题: Oceanography
题名: Photosynthetic activity and antioxidative response of seagrass Thalassia hemprichii to trace metal stress
作者: Li, L ; Huang, XP ; Borthakur, D ; Ni, H
通讯作者: xphuang@scsio.ac.cn
关键词: Thalassia hemprichii ; metal stress ; photosynthetic pigments ; quantum yield ; antioxidant enzymes
刊名: ACTA OCEANOLOGICA SINICA
发表日期: 2012
卷: 31, 期:3, 页:98-108
部门归属: [Li Lei; Huang Xiaoping] Chinese Acad Sci, S China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Li Lei] Chinese Acad Sci, Grad Univ, Beijing I00049, Peoples R China; [Li Lei] Chinese Acad Sci, Trop Marine Biol Res Stn Hainan, Sanya 572200, Peoples R China; [Li Lei] Sci & Technol Lib Guangdong Prov, Guangzhou 510070, Guangdong, Peoples R China; [Borthakur, Devajit] Tea Res Assoc, Tocklai Expt Stn, Jorhat 785008, Assam, India; [Ni Hui] Heze Univ, Foreign Language Dept, Heze 274000, Peoples R China
项目归属: LTO
摘要: This study concerned the accumulation of trace metals in tissues of seagrass (Thalassia hemprichii) exposed to various concentrations of Zn2+, Cd2+, Pb2+ and Cu2+ for 10 d, and the effect of excessive metals on quantum yield (Delta F/F-m'), photosynthetic pigments and antioxidative enzymes like superoxide dismutase (SOD), guaiacol peroxidase (POD) were also examined. Cadmium was the most highly accumulated metal. Meanwhile, high metals levels led to a remarkable breakdown of photosynthetic parameters. Especially, Delta F/F-m', chlorophyll and carotenoid were significantly low during prolonged Cu exposure. Besides, Delta F/F-m' was more severely depressed by Cu and Zn than Ph and Cd. However, T. hemprichii had positive response by increasing the activity of SOD and POD. The results indicate that T. hemprichii is the most sensitive to Cu, and the antioxidative protection mechanisms of T. hemprichii are more efficiently activated to avoid damage of Zn, Cd and Pb stress. Finally, due to the high Cd-accumulation and strong Cd-tolerance capacity, T. hemprichii can be used for phytoremediation in Cd-contaminated areas.
语种: 英语
WOS记录号: WOS:000305262200010
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10175
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Li, L; Huang, XP; Borthakur, D; Ni, H.Photosynthetic activity and antioxidative response of seagrass Thalassia hemprichii to trace metal stress,ACTA OCEANOLOGICA SINICA,2012,31(3):98-108
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