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首页> 外文期刊>RSC Advances >Role of N-acyl-homoserine lactone (AHL) based quorum sensing on biofilm formation on packing media in wastewater treatment process
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Role of N-acyl-homoserine lactone (AHL) based quorum sensing on biofilm formation on packing media in wastewater treatment process

机译：基于N-酰基 - 型杂环内酯（AHL）批量传感对废水处理过程中填料介质的生物膜形成的作用

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摘要

Quorum sensing (QS) signaling has been extensively studied in granules and single species populations. However, the knowledge regarding QS in biofilm formation on packing media has neither been experimentally explored nor theoretically addressed. We performed a long-term study to investigate the links between QS, organization and composition of complex microbial communities when biofilm developed on packing media. Three distinct phases were defined according to the weight of the biofilm and the removal rate of COD and ammonia nitrogen. Four kinds of N-acyl-homoserine-lactone (AHL) were found to be regularly and positively correlated with biofilm in growth stage (activation phase) (p < 0.01), while the correlation was not significant in other phases. Total AHL level was also closely related to the productions of extracellular polymeric substance (EPS), especially in polysaccharide. Sequence analysis results revealed that community structure changed with growth of biofilm, and top 34 most abundant community members had a significant correlation with AHLs production. Notably, biofilm and production of EPS, as well as community structure changed after dosing with nanomolar level of exogenous AHL in stable and mature biofilm, but this change was not a signal concentration-dependent manner. This study provides a foundation for investigation of QS effect on biofilm formation on packing media in many natural and engineered ecosystems, where it coordinates community behavior.
机译：在颗粒和单一物种群体中广泛研究了法定感测（QS）信号传导。然而，在包装媒体上的生物膜形成中的QS的知识既没有经过实验探索也没有理论上地解决。我们进行了长期研究，以研究在包装介质上发布的生物膜时复杂微生物社区的QS，组织和组成之间的联系。根据生物膜的重量和鳕鱼和氨氮的去除率定义三个不同的相。发现四种N-酰基 - 均静脉内酯 - 内酯（AHL）定期，与生长阶段（活化阶段）中的生物膜呈正相关（P <0.01），而相关性在其他阶段不显着。总AHL水平也与细胞外聚合物物质（EPS）的制作密切相关，特别是在多糖中。序列分析结果表明，群落结构随生物膜的生长而变化，最丰富的社区成员与AHLS生产具有显着相关性。值得注意的是，生物膜和EPS的产生，以及在稳定和成熟的生物膜中使用纳米摩尔水平的纳米摩尔水平加入群落结构，但这种变化不是信号浓度依赖性的方式。本研究为在许多自然和工程生态系统中对包装介质的QS对生物膜形成的影响，为其协调社区行为进行了研究。

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  • 来源
    《RSC Advances》 |2016年第14期|共12页
  • 作者

    Hu Huizhi; He Junguo; Liu Jian; Yu Huarong; Tang Jian; Zhang Jie;

  • 作者单位

    Harbin Inst Technol Sch Municipal &

    Environm Engn 73 Huanghe Rd Harbin Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn 73 Huanghe Rd Harbin Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn 73 Huanghe Rd Harbin Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn 73 Huanghe Rd Harbin Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn 73 Huanghe Rd Harbin Peoples R China;

    Harbin Inst Technol Sch Municipal &

    Environm Engn 73 Huanghe Rd Harbin Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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