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题名: Enhanced toxicity to the cyanobacterium Microcystis aeruginosa by low-dosage repeated exposure to the allelochemical N-phenyl-1-naphthylamine
作者: Gao, Y. N.2; Ge, F. J.1; Zhang, L. P.1; He, Y.1; Lu, Z. Y.1; Zhang, Y. Y.1; Liu, B. Y.1; Zhou, Q. H.1; Wu, Z. B.1
关键词: N-phenyl-1-naphthylamine ; Repeated exposure ; Microcystis aeruginosa ; Photosynthesis inhibition ; Cell membrane damage ; Residual dynamic
刊名: CHEMOSPHERE
发表日期: 2017-05-01
DOI: 10.1016/j.chemosphere.2017.01.102
卷: 174, 页:732-738
收录类别: SCI ; ISTP
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: It has been puzzling whether and how a plant could exert a strong allelopathic inhibition to the target organisms by releasing low concentrations of allelochemicals. Plant allelochemicals have been proposed to be released continuously, however, direct evidence from specific allelochemicals is urgently required. In the present study, the toxicity of allelochemical N-phenyl-1-naphthylamine (NPN) towards the cyanobacterium Microcystis aeruginosa by two different exposure patterns was compared. One was low dosage repeated exposure (LRE), in which 50 mu g L-1 NPN was repeatedly dosed to simulate the continual release of allelochemicals, and the other one was high-dosage single exposure (HSE) as per the routine toxicity assay. The results showed a significant growth inhibition to M. aeruginosa in the LRE group, where the inhibition rate reached above 90% from day 6 to day 9. The cell-membrane damage ratio increased from 64.05% on day 5 up to 96.60% on day 9. PSII photosynthesis activity expressed as Fv/Fm, Phi(PSII), NPQ and ETRmax was also thoroughly inhibited in this group. Whereas the growth and PSII photosynthesis activity of M. aeruginosa in the HSE group were inhibited initially, but recovered gradually from day 4 or 5, which was accompanied by a continuous reduction of NPN content in culture solutions. Although NPN content in the LRE group was relatively lower, it remained at a more stable level throughout the experiment. These results indicate that continual release of low-dosage allelochemicals by aquatic plants plays crucial roles in their potent inhibition against cyanobacteria. Low-dosage continual exposure pattern needs to be investigated further. (C) 2017 Elsevier Ltd. All rights reserved,
关键词[WOS]: MACROPHYTE MYRIOPHYLLUM-SPICATUM ; BLUE-GREEN-ALGAE ; CHLOROPHYLL FLUORESCENCE ; FATTY-ACIDS ; SUBMERGED MACROPHYTES ; POTAMOGETON-MALAIANUS ; GROWTH ; PHYTOPLANKTON ; POLYPHENOLS ; PHOTOSYNTHESIS
语种: 英语
项目资助者: National Natural Science Foundation of China(31500380) ; Major Science and Technology Program in Henan Province(152102210289) ; Key Scientific Research Project of Colleges and Universities in Henan Province(15A240001) ; Youth Science Fund of Henan Normal University(2014QK25) ; Doctoral Scientific Research Start-up Foundation of Henan Normal University(qd14179)
WOS记录号: WOS:000397076000079
ISSN号: 0045-6535
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/29059
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
2.Henan Normal Univ, Engn Technol Res Ctr Henan Prov Aquat Anim Cultiv, Coll Fisheries, Xinxiang 453007, Henan, Peoples R China
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