Effects of Inhibiting Acylated Homoserine Lactones (AHLs) on Anammox Activity and Stability of Granules’

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• 作者：Ran Zhao ; Hanmin Zhang ; Xiang Zou ; Fenglin Yang
• 刊名：Current Microbiology
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：73
• 期：1
• 页码：108-114
• 全文大小：874 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Microbiology
  Biotechnology
  
• 出版者：Springer New York
• ISSN：1432-0991
• 卷排序：73

文摘

In this study, the effects of AHL-based QS signals on anammox activity and stability of granules’ were investigated. Results clearly showed that the vanillin and porcine kidney acylase I could reduce the AHLs in anammox bacteria. Inactivation of AHLs by vanillin and porcine kidney acylase I depressed the nitrogen removal ability of anammox bacteria. A significant inhibition of specific anammox activity was observed when the concentration of vanillin and porcine kidney acylase I increased to 1 g/L. Anammox activity was depressed on enzyme level. Moreover, degradation of AHLs under vanillin and AHL-acylase exposure could result in anammox granules’ disintegration. Further research showed that the contents of protein (PN) and polysaccharides (PS) in extracellular polymeric substances were reduced with AHLs blocked, and it further explained the instability and weakening strength of the anammox granules. The results of our investigation provided new insight into the AHL-based QS-regulated anammox activity, leading a potential way to enhance stability of anammox granules.Electronic supplementary materialThe online version of this article (doi:10.1007/s00284-016-1031-y) contains supplementary material, which is available to authorized users.