Authors: Rui Wan Yuyin Yang Weimin Sun Zhao Wang Shuguang Xie
Publish Date: 2013/11/06
Volume: 21, Issue: 4, Pages: 3175-3181
Abstract
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 ammoniaoxidizing archaea AOA and bacteria AOB in nonagricultural 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 qPCR and terminal restriction fragment length polymorphism TRFLP respectively The coexistence 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 nonbioaugmented 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 striazine bioremediation and ammoniaoxidizing microorganisms in soil ecosystem
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