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题名: Generation of reactive oxygen species in cyanobacteria and green algae induced by allelochemicals of submerged macrophytes
作者: Wang, Jing (1) ; Zhu, Junying (1) ; Liu, Shaoping (3) ; Liu, Biyun (1) ; Gao, Yunni (1) ; Wu, Zhenbin (1)
通讯作者: Wu, Z.(wuzb@ihb.ac.cn)
刊名: Chemosphere
发表日期: 2011
卷: 85, 期:6, 页:977-982
收录类别: EI
部门归属: (1) State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (2) Graduate School of Chinese Academy of Sciences, Beijing 100039, China; (3) Medical Research Center of Zhongnan Hospital, Wuhan University, Wuhan 430071, China
摘要: Inhibition of phytoplankton by allelochemicals released by submerged macrophytes is reported to be one of the mechanisms that maintain a clear-water state in shallow lakes. In order to elucidate this mechanism, the ability of six polyphenols and two long-chain fatty acids to induce the generation of reactive oxygen species (ROS) in phytoplankton was studied using the ROS sensitive probe 2',7'- dichlorodihydrofluorescein diacetate (DCFH-DA). The results showed that only (+)-catechin (CA) and pyrogallic acid (PA) could induce ROS formation in Microcystis aeruginosa and Pseudokirchneriella subcapitata. 25mgL-1 CA caused 1.2, 1.4 and 1.8 times increase of ROS levels in M. aeruginosa at 1, 2 and 4h exposure, respectively, and, correspondingly in P. subcapitata cells, these values were 3.7, 6.2 and 7.7, respectively. PA also significantly increased the levels of intracellular ROS in P. subcapitata (P<0.01); however, significant ROS generation in M. aeruginosa was observed at only 4h exposure (P<0.01). Light enhanced ROS generation in CA treated cells, but not in the cells treated with PA. CA and PA may act as redox cyclers after uptake by test organisms and produce ROS successively. These results suggest that the oxidative stress induced by the redox cycling property of allelochemicals may be one of the important causes for the inhibitory effect of some submerged macrophytes towards undesired phytoplankton in natural aquatic ecosystems.
语种: 英语
WOS记录号: WOS:000298223400009
ISSN号: 0045-6535
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/16682
Appears in Collections:水环境工程研究中心_期刊论文

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Wang, Jing (1); Zhu, Junying (1); Liu, Shaoping (3); Liu, Biyun (1); Gao, Yunni (1); Wu, Zhenbin (1) .Generation of reactive oxygen species in cyanobacteria and green algae induced by allelochemicals of submerged macrophytes,Chemosphere,2011,85(6):977-982
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