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首页> 外文期刊>Environmental Science & Technology >Sustained High Nutrient Supply As an Allelopathic Trigger between Periphytic Biofilm and Microcystis aeruginosa
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Sustained High Nutrient Supply As an Allelopathic Trigger between Periphytic Biofilm and Microcystis aeruginosa

机译：持续的高营养供应，作为互生的生物膜和铜绿微囊藻之间的化感触发

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摘要

Allelopathy among aquatic organisms, especially microorganisms, has received growing attention in recent years for its role in shaping interactions with bloom-forming algae. Many studies have shown that allelopathy occurs and increases under nutrient limiting conditions. However, to date there is no reported direct evidence to indicate that allelopathy occurs under the condition of constant high nutrient supply. Here we report the allelopathic action of periphytic biofilm on bloom-forming cyanobacteria (Microcystis aeruginosa), which was triggered by the stress of high nutrient conditions, and continues while nutrients are maintained at high levels (trophic state index at 159 and 171). The experimental evidence indicates that the electron transport from photosystem II (PS II) to photosystem I (PS I) in M. aeruginosa is interrupted by the identified allelochemicals, (9Z)-Octadec-9 -enoic acid and (9Z)-Hexadec-9-enoic acid, leading to the failure of photosynthesis and the subsequent death of M. aeruginosa. Our findings indicate that the nutrient stress of constant high nutrient supply may be a newly recognized trigger causing allelopathy between microbial competitors, and therefore opening a new direction for the better management of ecological processes in cyanobacteria-dominated and hyper-eutrophic waters.
机译：近年来，水生生物特别是微生物中的化感作用因其与形成藻类的藻类相互作用而受到越来越多的关注。许多研究表明，在营养限制条件下，化感作用会发生并加剧。然而，迄今为止，尚无直接证据表明化感作用发生在持续高养分供应的情况下。在这里，我们报告了高浓度养分胁迫引起的周围植物生物膜对形成水华的蓝细菌（铜绿微囊藻）的化感作用，并在养分保持高水平（营养状态指数分别为159和171）时继续发生。实验证据表明，铜绿假单胞菌中从光系统II（PS II）到光系统I（PS I）的电子传输被所识别的化感物质，（9Z）-Octadec-9-烯酸和（9Z）-Hexadec- 9-烯酸，导致光合作用失败并随后导致铜绿假单胞菌死亡。我们的研究结果表明，持续提供大量养分的养分压力可能是引起微生物竞争者之间发生化感作用的新认识触发因素，因此为在蓝藻为主的水和富营养化水域更好地管理生态过程开辟了新的方向。

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  • 来源
    《Environmental Science & Technology》 |2017年第17期|9614-9623|共10页
  • 作者

    Yonghong Wu; Jun Tang; Junzhuo Liu; Bruce Graham; Philip G. Kerr; Hong Chen;

  • 作者单位

    State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences No.71, East Beijing Road, Nanjing 210008, China;

    State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences No.71, East Beijing Road, Nanjing 210008, China,College of Resource and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences No.71, East Beijing Road, Nanjing 210008, China;

    School of Biomedical Sciences, Charles Sturt University, Boorooma St, Wagga Wagga, 2678, New South Wales, Australia;

    School of Biomedical Sciences, Charles Sturt University, Boorooma St, Wagga Wagga, 2678, New South Wales, Australia;

    State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences No.71, East Beijing Road, Nanjing 210008, China,College of Resource and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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