Characteristics and bacterial community dynamics during extracellular polymeric substance (EPS) degradation of cyanobacterial blooms
文献类型：期刊论文
| 作者 | Ye, Tianran; Zhao, Zhen; Bai, Leilei; Song, Na; Jiang, Helong |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2020 |
| 卷号 | 748 |
| 英文摘要 | Extracellular polymeric substances (EPSs), which composed of different organic components, play an important role in the formation of mucilaginous cyanobacterial bloom. However, how the phylogeny of microbial community coupling with the degradation of EPSmatrixes remains unclear. A better understanding of the dynamic process not only give insight into the carbon cycling in the phycosphere, but also provide a new approach for controlling the cyanobacteria bloom. In this study, fractionated EPSs were prepared as a carbon source to enrich different particle sizemicroorganisms. Changes of organic components in EPSs andmicrobial communities in the degradation process were investigated using Fluorescence excitation and emission matrix (EEM) and Illumina sequencing. The results showed that it is the change of organic components in the degradation process that causes the microbial community to follow a certain succession law. Size-fractionated microorganisms exhibited different hydrolytic activitieswhen interacting with macromolecules, but they did not present different phylogenetic compositions. The changes of humic-like C1 and tryptophan-like C3 in EPSswere significantly correlated to the variations ofmicrobial community composition and diversity. Tightly-bound EPSs (TB-EPSs) contained more low molecular single carbon compounds and were more easily utilized by more diverse microorganisms. Betaproteobacteria, Firmicute, Alphaproteobacteria, Sphingobacteria and Actinobacter were significantly correlated with the changes of organicmaters through the humification process. Meanwhile, loosely-bound EPSs (LB-EPSs), which composed of moremacromolecules, were more affiliated to a functional organized microbial community. When Gammaproteobacteria and Betaproteobacteriawere involved in LB-EPS degradation as indicators, the poly-saccharide structures changed dramatically. And the content of some small molecules was briefly increased during the degradation process. Therefore, in order to prevent algal bloom from reducing cellular aggregation by decreasing viscous EPSs, specialized microbial communities should be considered in the phycosphere. (c) 2020 Elsevier B.V. All rights reserved. |
| 源URL | [http://159.226.73.51/handle/332005/20001]  |
| 专题 | 中国科学院南京地理与湖泊研究所 |
| 推荐引用方式 GB/T 7714 | Ye, Tianran,Zhao, Zhen,Bai, Leilei,et al. Characteristics and bacterial community dynamics during extracellular polymeric substance (EPS) degradation of cyanobacterial blooms[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,748. |
| APA | Ye, Tianran,Zhao, Zhen,Bai, Leilei,Song, Na,&Jiang, Helong.(2020).Characteristics and bacterial community dynamics during extracellular polymeric substance (EPS) degradation of cyanobacterial blooms.SCIENCE OF THE TOTAL ENVIRONMENT,748. |
| MLA | Ye, Tianran,et al."Characteristics and bacterial community dynamics during extracellular polymeric substance (EPS) degradation of cyanobacterial blooms".SCIENCE OF THE TOTAL ENVIRONMENT 748(2020). |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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