Functional response of sediment bacterial community to iron-reducing bioaugmentation with Shewanella decolorationis S12
Functional response of sediment bacterial community to iron-reducing bioaugmentation with Shewanella decolorationis S12
复制标题
沉积物细菌群落对脱色希瓦氏菌 S12 铁还原生物强化的功能响应
DOI：
10.1007/s00253-019-09816-w
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发表时间：
2019-04
影响因子：
5
通讯作者：
Xu Meiying
中科院分区：
文献类型：
--
作者：
Pan Yuanyuan;Yang Xunan;Sun Guoping;Xu Meiying
利用外源功能微生物进行生物强化是生物工程和环境修复中广泛应用的技术。通常，接种细菌的定殖被认为是技术成功的决定因素。然而，越来越多的报道表明，当接种细菌的定殖不成功时，生物强化仍然有效。在这里，与铁还原菌（IRB，Shewanella decolorationis S12）的强化研究进行了铁（II）-贫沉积物，以阐明外源接种的细菌的生物强化性能的作用。结果表明，足够量的IRB输入增强了生物强化沉积物中的铁还原，即使外源性IRB在实验开始后没有定殖（在第3天小于1%）。铁还原功能的土著IRB社区，如梭菌，贪铜菌，Fervidicella和不动杆菌，其中包括不到1%的初始沉积物的刺激。此外，与对照沉积物中的微生物群落相比，添加S12的沉积物中的OTU之间的正相关性更高。沉积物的pH值和氧化还原电位是形成铁还原微生物群落的主要因素。说明外源IRB通过改变接种菌的微环境，成功地实现了功能菌群的稳定。总的来说，这项研究提供了一个新的见解，了解单一菌株添加在铁还原生物强化中的作用。
Bioaugmentation with exogenously functional microbes is a widely used technology in bioengineering and environmental remediation. Generally, the colonization of inoculated bacteria is considered to be the determining factor in technical success. However, increasing reports have shown that bioaugmentation was still effective when the colonization of inoculated bacteria was unsuccessful. Here, an augmentation study with iron-reducing bacteria (IRB, Shewanella decolorationis S12) was conducted in Fe(II)-poor sediments to elucidate the role of exogenously inoculated bacteria for bioaugmentation performance. The results showed that a sufficient amount of IRB inputs enhanced the iron reduction in bioaugmented sediments, even though the exogenous IRB did not colonize after the beginning of the experiment (less than 1% at day 3). The iron reduction function responded to stimulation of the indigenous IRB community such as Clostridium, Cupriavidus, Fervidicella, and Acinetobacter, which comprised less than 1% in the initial sediments. Moreover, compared with microbial community in control sediment, more positive correlations between OTUs were observed for that in S12-added sediments upon network analysis. The pH and oxidation-reduction potential of sediment were found to be the predominant factors shaping the iron-reducing microbial communities. It meant that exogenous IRB successfully trigged functional community via altering microenvironment by the inoculated bacteria. Overall, this study provides a new insight into the understanding of the role of single strain addition in iron-reducing bioaugmentation.
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影响因子：
11.4
作者：
Yonggang Yang;G. Sun;Jun Guo;Meiying Xu
通讯作者：
Yonggang Yang;G. Sun;Jun Guo;Meiying Xu
影响因子：
3.6
作者：
R. Jia;Lina Li;D. Qu
通讯作者：
R. Jia;Lina Li;D. Qu
影响因子：
--
作者：
L. Chang;D. Ibrahim;I. Omar
通讯作者：
L. Chang;D. Ibrahim;I. Omar
影响因子：
2.3
作者：
T. Naganuma;Makoto Sato;Daiki Hoshii;Yuki Amano-Murakami;T. Iwatsuki;K. Mandernack
通讯作者：
T. Naganuma;Makoto Sato;Daiki Hoshii;Yuki Amano-Murakami;T. Iwatsuki;K. Mandernack
影响因子：
5.8
作者：
Zhao Wang;Yuyin Yang;Weimin Sun;Yu Dai;Shuguang Xie
通讯作者：
Zhao Wang;Yuyin Yang;Weimin Sun;Yu Dai;Shuguang Xie