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Front. Microbiol. | doi: 10.3389/fmicb.2018.00225

Acclimation of Culturable Bacterial Communities under the Stresses of Different Organic Compounds

 Hui Wang1, Shuangfei Zhang1, Amit Pratush1, Xueying Ye1, Jinli Xie1, Huan Wei1, Chongran Sun1 and  Zhong Hu1*
  • 1Shantou University, China

The phylogenetic diversity of bacterial communities in response to environmental disturbances such as organic pollution has been well studied, but little is known about the way in which organic contaminants influence the acclimation of functional bacteria. In the present study, tolerance assays for bacterial communities from the sediment in the Pearl River Estuary were conducted with the isolation of functional bacteria using pyrene and different estrogens as environmental stressors. Molecular ecological networks and phylogenetic trees were constructed using both 16S rRNA gene sequences of cultured bacterial strains and 16S rRNA gene based pyrosequencing data to illustrate the successions of bacterial communities and their acclimations to the different organic compounds. One hundred and eleven bacterial strains exhibiting degradation and endurance capabilities in response to the pyrene estrogen-induced stress were successfully isolated and were mainly affiliated with three orders, Pseudomonadales, Vibrionales, and Rhodobacterales. Molecular ecological networks and phylogenetic trees showed various adaptive abilities of bacteria to the different organic compounds. For instance, some bacterial OTUs could be found only in particular organic compound-treated groups while some other OTUs could tolerate stresses from different organic compounds. Furthermore, the results indicated that some new phylotypes were emerged under stresses of different organic pollutions and these new phylotypes could adapt to the contaminated environments and contribute significantly to the microbial community shifts. Overall, this study demonstrated a crucial role of the community succession and the acclimation of functional bacteria in the adaptive responses to various environmental disturbances.

Keywords: pyrene, Estrogens, Functional bacteria, Phylotypes, network

Received: 24 Oct 2017; Accepted: 30 Jan 2018.

Edited by:

Rachel S. Poretsky, University of Illinois at Chicago, United States

Reviewed by:

Jincai Ma, Jilin University, China
Mariusz Cycoń, Medical University of Silesia, Poland  

Copyright: © 2018 Wang, Zhang, Pratush, Ye, Xie, Wei, Sun and Hu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Zhong Hu, Shantou University, Shantou, China, hzh@stu.edu.cn