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Study on the mechanism of allelopathic influence on cyanobacteria and chlorophytes by submerged macrophyte (Myriophyllum spicatum) and its secretion
Zhu, Junying; Liu, Biyun; Wang, Jing; Gao, Yunni; Wu, Zhenbin; Wu, ZB, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
2010
Source PublicationAQUATIC TOXICOLOGY
ISSN0166-445X
Volume98Issue:2Pages:196-203
AbstractFor revealing the mechanism of allelopathic influence on phytoplankton by aquatic macrophytes, the growth and photosynthetic activities of cyanobacteria Microcystis aeruginosa and the chlorophyte Selenastrum capricornutum were investigated when they coexisted with submerged macrophyte Myriophyllum spicatum and were exposed to allelopathic polyphenols: pyrogallic acid (PA), gallic acid (GA), ellagic acid (EA) and (+)-catechin (CA). According to the results of coexistence assays, the non-photochemical quenching (NPQ) and effective quantum efficiency (YII) of M. aeruginosa were affected earlier and more rapidly than the cell density. However, the influence of M. spicatum on S. capricornutum was not found. When the Toxicity Index (TI) was applied to evaluate the combined effects of binary and multiple mixtures of polyphenols, it was found that the four tested polyphenols with the proportion identified in the M. spicatum-cultured solution were observed to present synergistic effect (0.36-0.49) according to the cell density, NPQ and YII of M. aeruginosa. With the combined effects of polyphenols on S. capricornutum, only additive action (0.52-1.62) was found. On the other hand, PA (2.97 mg L-1), GA (2.65 mg L-1) caused significant reductions of photosystem (PSII) and whole electron transport chain activities of M. aeruginosa by 71.43 and 18.37%, 70.95 and 40.77% (P<0.05), respectively, after 24-h exposure, but no inhibition effect was found in S. capricornutum. The dark respiration and photosystem I (PSI) activities of M. aeruginosa were significantly increased by exposure to PA and GA (P<0.05). Nevertheless, EA and CA had no influence on the electron transport activities of the tested organisms. These results indicate that the reduction in photosynthetic activity of M. aeruginosa and the synergistic effect of allelochemicals may be two important causes for the inhibition of undesired phytoplankton by submersed macrophytes in natural aquatic ecosystems, and PSII in cyanobacteria is considered to be one of the target sites attacked by allelopathic polyphenols. (C) 2010 Published by Elsevier B.V.
KeywordAllelopathic Polyphenols Phytoplankton Chlorophyll a Fluorescence Combined Effects Electron Transport Activity
Department[Zhu, Junying; Liu, Biyun; Wang, Jing; Gao, Yunni; Wu, Zhenbin] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China; [Zhu, Junying; Wang, Jing; Gao, Yunni] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Subject AreaMarine & Freshwater Biology ; Toxicology
Funding OrganizationNational Natural Science Foundation of China [30870221, 20877093, 50808172]; China Postdoctoral Science Foundation [20080431013] ; National Natural Science Foundation of China [30870221, 20877093, 50808172]; China Postdoctoral Science Foundation [20080431013] ; National Natural Science Foundation of China [30870221, 20877093, 50808172]; China Postdoctoral Science Foundation [20080431013] ; National Natural Science Foundation of China [30870221, 20877093, 50808172]; China Postdoctoral Science Foundation [20080431013]
Indexed BySCI
Language英语
WOS IDWOS:000278891100011
Funding OrganizationNational Natural Science Foundation of China [30870221, 20877093, 50808172]; China Postdoctoral Science Foundation [20080431013] ; National Natural Science Foundation of China [30870221, 20877093, 50808172]; China Postdoctoral Science Foundation [20080431013] ; National Natural Science Foundation of China [30870221, 20877093, 50808172]; China Postdoctoral Science Foundation [20080431013] ; National Natural Science Foundation of China [30870221, 20877093, 50808172]; China Postdoctoral Science Foundation [20080431013]
Citation statistics
Cited Times:104[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/13697
Collection水环境工程研究中心_期刊论文
Corresponding AuthorWu, ZB, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Junying,Liu, Biyun,Wang, Jing,et al. Study on the mechanism of allelopathic influence on cyanobacteria and chlorophytes by submerged macrophyte (Myriophyllum spicatum) and its secretion[J]. AQUATIC TOXICOLOGY,2010,98(2):196-203.
APA Zhu, Junying,Liu, Biyun,Wang, Jing,Gao, Yunni,Wu, Zhenbin,&Wu, ZB, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China.(2010).Study on the mechanism of allelopathic influence on cyanobacteria and chlorophytes by submerged macrophyte (Myriophyllum spicatum) and its secretion.AQUATIC TOXICOLOGY,98(2),196-203.
MLA Zhu, Junying,et al."Study on the mechanism of allelopathic influence on cyanobacteria and chlorophytes by submerged macrophyte (Myriophyllum spicatum) and its secretion".AQUATIC TOXICOLOGY 98.2(2010):196-203.
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