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[SCIENCE OF THE TOTAL ENVIRONMENT],卷: 640 页: 9-17
 点击数:52次 添加时间:  [关闭] [收藏]

作者:Wang, BB (Wang, Beibei) ; Teng, Y (Teng, Ying) ; Xu, YF (Xu, Yongfeng) ; Chen, W (Chen, Wei); Ren, WJ (Ren, Wenjie) ; Li, Y (Li, Yan) ; Christie, P (Christie, Peter) ; Luo, YM (Luo, Yongming)

 

题目:Effect of mixed soil microbiomes on pyrene removal and the response of the soil microorganisms

 

刊物:SCIENCE OF THE TOTAL ENVIRONMENT,卷: 640  页: 9-17

DOI: 10.1016/j.scitotenv.2018.05.290

出版年:NOV 1 2018

 

文章下载:https://ac.els-cdn.com/S0048969718319417/1-s2.0-S0048969718319417-main.pdf?_tid=0957993e-d579-4e3c-b3d0-981fc1b6920c&acdnat=1539331345_de8ef0c9bc2e0d9cbbcf3b9198d427d6

 

摘要:

Mixed soil microbiomes were established by introducing aliquots of a paddy soil into a red soil. The new mixed microbiomes effectively metabolized high-molecular-weight polycyclic aromatic hydrocarbons (PAHs, pyrene) in the soil mixtures. The pyrene removal efficiencies were 19% and 98%, respectively, in the original red soil and the paddy soil. The pyrene removal effectiveness by the mixed microbial community was enhanced by increasing the amount of paddy soil inoculant and the pyrene removal rates were 93%, 58% and 27% in paddy soil/red soil mixtures of 1:1, 3:7 and 1:9 (w/w), respectively. Supplementation with sterile paddy soil and nutrients changed the soil environment but the pyrene removal efficiency was not enhanced, indicating that the microbial composition largely determined the extent of pyrene removal. Moreover, the pyrene removal rate was positively related to the pyrene dioxygenase gene (nidA) abundance. The greater the percentage of the paddy soil in the soil mixture the greater the similarity of the mixed microbiome to that of the original paddy soil itself. The community of the inoculated sterile paddy soil was similar to that of the red soil and the community diverged from those of the red soil and the paddy soil with increasing culture time. After culture for 42 days, some enriched genera were responsible for PAH degradation, notably Nevskia, Ralstonia, Gemmatimonas and Lysobacter, while some genera have no clear classification information or category name at the genus level, such as f__ Acidobacteriaceae and o__ JG30-KF-AS9. This study is very important in recognizing the role of natural soil in the formation of a mixed microbiome to stimulate the degradation of PAHs in a soil with low intrinsic PAH degradation capability. (C) 2018 Elsevier B.V. All rights reserved.

 

 

 

 

 

 

 

 

 

 

 


 

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