Diverse Microbial Communities Aid In Pollution Control For Coastal Environments

‘Candidatus Oscillochloris kuznetsovii’ a novel mesophilic filamentous anoxygenic phototrophic Chloroflexales bacterium from Arctic coastal environments

FEMS Microbiology Letters ◽

10.1093/femsle/fnaa158 ◽

2020 ◽

Vol 367 (19) ◽

Author(s):

Vasil A Gaisin ◽

Denis S Grouzdev ◽

Maria S Krutkina ◽

Aleksandr A Ashikhmin ◽

Maria A Sinetova ◽

...

Keyword(s):

Microbial Communities ◽

High Performance ◽

Hot Spring ◽

Calvin Cycle ◽

Phylogenomic Analysis ◽

Coastal Environments ◽

Anoxygenic Phototrophs ◽

Thermal Environments ◽

Genes Encoding ◽

Kandalaksha Gulf

ABSTRACT Chloroflexales bacteria are mostly known as filamentous anoxygenic phototrophs that thrive as members of the microbial communities of hot spring cyanobacterial mats. Recently, we described many new Chloroflexales species from non-thermal environments and showed that mesophilic Chloroflexales are more diverse than previously expected. Most of these species were isolated from aquatic environments of mid-latitudes. Here, we present the comprehensive characterization of a new filamentous multicellular anoxygenic phototrophic Chloroflexales bacterium from an Arctic coastal environment (Kandalaksha Gulf, the White Sea). Phylogenomic analysis and 16S rRNA phylogeny indicated that this bacterium belongs to the Oscillochloridaceae family as a new species. We propose that this species be named ‘Candidatus Oscillochloris kuznetsovii’. The genomes of this species possessed genes encoding sulfide:quinone reductase, the nitrogenase complex and the Calvin cycle, which indicate potential for photoautotrophic metabolism. We observed only mesophilic anaerobic anoxygenic phototrophic growth of this novel bacterium. Electron microphotography showed the presence of chlorosomes, polyhydroxyalkanoate-like granules and polyphosphate-like granules in the cells. High-performance liquid chromatography also revealed the presence of bacteriochlorophylls a, c and d as well as carotenoids. In addition, we found that this bacterium is present in benthic microbial communities of various coastal environments of the Kandalaksha Gulf.

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Gradients of three coastal environments off the South China Sea and their impacts on the dynamics of heterotrophic microbial communities

The Science of The Total Environment ◽

10.1016/j.scitotenv.2018.12.405 ◽

2019 ◽

Vol 659 ◽

pp. 499-506 ◽

Cited By ~ 3

Author(s):

Xianhua Liu ◽

Biswarup Sen ◽

Yue Zhao ◽

Mohan Bai ◽

Yaodong He ◽

...

Keyword(s):

South China Sea ◽

Microbial Communities ◽

South China ◽

The South China Sea ◽

Coastal Environments ◽

The South ◽

China Sea

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A peek in the micro-sized world: a review of design principles, engineering tools, and applications of engineered microbial community

Biochemical Society Transactions ◽

10.1042/bst20190172 ◽

2020 ◽

Vol 48 (2) ◽

pp. 399-409

Author(s):

Baizhen Gao ◽

Rushant Sabnis ◽

Tommaso Costantini ◽

Robert Jinkerson ◽

Qing Sun

Keyword(s):

Microbial Community ◽

Microbial Communities ◽

Environmental Remediation ◽

Real Life ◽

Design Principles ◽

Microbial Interactions ◽

Potential Applications ◽

New Gene ◽

Global Biogeochemical Cycles ◽

Synthetic Microbial Communities

Microbial communities drive diverse processes that impact nearly everything on this planet, from global biogeochemical cycles to human health. Harnessing the power of these microorganisms could provide solutions to many of the challenges that face society. However, naturally occurring microbial communities are not optimized for anthropogenic use. An emerging area of research is focusing on engineering synthetic microbial communities to carry out predefined functions. Microbial community engineers are applying design principles like top-down and bottom-up approaches to create synthetic microbial communities having a myriad of real-life applications in health care, disease prevention, and environmental remediation. Multiple genetic engineering tools and delivery approaches can be used to ‘knock-in' new gene functions into microbial communities. A systematic study of the microbial interactions, community assembling principles, and engineering tools are necessary for us to understand the microbial community and to better utilize them. Continued analysis and effort are required to further the current and potential applications of synthetic microbial communities.

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