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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Effects of Nitrogen Forms on the Production of Cyanobacterial Toxin Microcystin-LR by an Isolated Microcystis aeruginosa
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Effects of Nitrogen Forms on the Production of Cyanobacterial Toxin Microcystin-LR by an Isolated Microcystis aeruginosa

机译：氮形态对分离的铜绿微囊藻产生蓝细菌毒素微囊藻毒素LR的影响

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摘要

A cyanobacterial strain, which produced high content of microcystin-LR (MC-LR) but no microcystin-RR (MC-RR), was isolated from the hypertrophic Dianchi Lake in China and identified as Microcystis aeruginosa DC-1. Effects of nitrogen containing chemicals and trace elements on the growth and the production of MC-LR by this strain were studied. In the presence of bicine, compared with urea and ammonium, nitrate greatly promoted the growth and the production of MC-LR. However, leucine and arginine, which were the constitutional components in the molecular structure of MC-LR or RR, inhibited the production of MC-LR. Iron and silicon up to 10 mg/L had little effects on the growth of M. aeruginosa DC-1, but the production of MC-LR was apparently enhanced. Under all conditions studied here, only MC-LR but no RR was detected within the cells of M. aeruginosa DC-1. Thus, chemical forms of nitrogen, rather than the usually concerned the total nitrogen, and trace elements played important roles in the production of MC toxins during cyanobacterial blooms.
机译：从中国肥厚的滇池分离出一株蓝藻菌株，该菌株产生高含量的微囊藻毒素-LR（MC-LR），但未产生微囊藻毒素-RR（MC-RR），被鉴定为铜绿微囊藻DC-1。研究了含氮化学物质和微量元素对该菌株的生长和MC-LR产量的影响。在存在比辛胺的情况下，与尿素和铵盐相比，硝酸盐大大促进了MC-LR的生长和生产。然而，亮氨酸和精氨酸是MC-LR或RR分子结构中的组成成分，抑制了MC-LR的产生。高达10 mg / L的铁和硅对铜绿假单胞菌DC-1的生长影响很小，但MC-LR的产量明显提高。在这里研究的所有条件下，铜绿假单胞菌DC-1的细胞中仅检测到MC-LR，而未检测到RR。因此，氮的化学形式，而不是通常涉及的总氮，以及微量元素在蓝细菌开花期间产生MC毒素中起着重要作用。

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  • 来源
  • 作者

    Hai Yan; Gang Pan; Hua Zou; Lirong Song; Mingming Zhang;

  • 作者单位

    State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-environmental Sciences Chinese Academy of Sciences Beijing, China;

    State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-environmental Sciences Chinese Academy of Sciences Beijing, China;

    State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-environmental Sciences Chinese Academy of Sciences Beijing, China;

    Institute of Hydrobiology Chinese Academy of Sciences Wuhan, China;

    State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-environmental Sciences Chinese Academy of Sciences Beijing, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境科学、安全科学;
  • 关键词

    Microcystin-LR; Microcystis aeruginosa DC-1; Nitrogen; Iron; Silicon;

    机译：微囊藻毒素LR;铜绿微囊藻DC-1;氮;铁;硅;

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