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首页> 外文期刊>Environmental Science and Pollution Research >Simazine biodegradation and community structures of ammonia-oxidizing microorganisms in bioaugmented soil: impact of ammonia and nitrate nitrogen sources
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Simazine biodegradation and community structures of ammonia-oxidizing microorganisms in bioaugmented soil: impact of ammonia and nitrate nitrogen sources

机译：强化土壤中辛嗪生物降解和氨氧化微生物的群落结构：氨和硝酸盐氮源的影响

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摘要

The objective of the present study was to investigate the impact of ammonia and nitrate nitrogen sources on simazine biodegradation by Arthrobacter sp. strain SD1 and the community structures of ammonia-oxidizing archaea (AOA) and bacteria (AOB) in non-agricultural soil. Soil microcosms with different treatments were constructed for herbicide biodegradation test. The relative abundance of the strain SD1 and the structures of AOA and AOB communities were assessed using quantitative PCR (q-PCR) and terminal restriction fragment length polymorphism (TRFLP), respectively. The co-existence of two inorganic nitrogen sources (ammonia and nitrate) had certain impact on simazine dissipation by the strain SD1. Bioaugmentation could induce a shift in the community structures of both AOA and AOB, but AOA were more responsive. Nitrogen application had significant impacts on AOA and AOB communities in bioaugmented soils. Moreover, in non-bioaugmented soil, the community structure of AOA, instead of AOB, could be quickly recovered after herbicide application. This study could add some new insights towards the impacts of nitrogen sources on s-triazine bioremediation and ammonia-oxidizing microorganisms in soil ecosystem.
机译：本研究的目的是研究节杆菌属细菌对氨氮和硝酸盐氮源对Simazine生物降解的影响。非农业土壤中SD1菌株和氨氧化古细菌（AOA）和细菌（AOB）的群落结构。构建了不同处理方式的土壤微观世界进行除草剂的生物降解试验。分别使用定量PCR（q-PCR）和末端限制性片段长度多态性（TRFLP）评估了SD1菌株的相对丰度以及AOA和AOB群落的结构。两种无机氮源（氨和硝酸盐）的共存对SD1菌株对Simazine的耗散有一定影响。生物强化可以诱导AOA和AOB的群落结构发生转变，但AOA的反应更快。施氮对生物强化土壤中的AOA和AOB群落有重大影响。此外，在非生物强化的土壤中，施用除草剂后，AOA的群落结构而非AOB可以快速恢复。这项研究可以为氮源对土壤生态系统中S-三嗪生物修复和氨氧化微生物的影响提供新的见解。

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