Journal of Microbiology

Journal Articles

Autotrophy to Heterotrophy: Shift in Bacterial Functions During the Melt Season in Antarctic Cryoconite Holes: Aritri Sanyal, Runa Antony, Gautami Samui, Meloth Thamban; J. Microbiol. 2024;62(8):591-609. Published online May 30, 2024; DOI: https://doi.org/10.1007/s12275-024-00140-1

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Microbes residing in cryoconite holes (debris, water, and nutrient-rich ecosystems) on the glacier surface actively participate in carbon and nutrient cycling. Not much is known about how these communities and their functions change during the summer melt-season when intense ablation and runoff alter the influx and outflux of nutrients and microbes. Here, we use high-throughput-amplicon sequencing, predictive metabolic tools and Phenotype MicroArray techniques to track changes in bacterial communities and functions in cryoconite holes in a coastal Antarctic site and the surrounding fjord, during the summer season. The bacterial diversity in cryoconite hole meltwater was predominantly composed of heterotrophs (Proteobacteria) throughout the season. The associated functional potentials were related to heterotrophic-assimilatory and -dissimilatory pathways. Autotrophic Cyanobacterial lineages dominated the debris community at the beginning and end of summer, while heterotrophic Bacteroidota- and Proteobacteria-related phyla increased during the peak melt period. Predictive functional analyses based on taxonomy show a shift from predominantly phototrophy-related functions to heterotrophic assimilatory pathways as the melt-season progressed. This shift from autotrophic to heterotrophic communities within cryoconite holes can affect carbon drawdown and nutrient liberation from the glacier surface during the summer. In addition, the flushing out and export of cryoconite hole communities to the fjord could influence the biogeochemical dynamics of the fjord ecosystem.

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Extensive Genomic Rearrangement of Catalase-Less Cyanobloom-Forming Microcystis aeruginosa in Freshwater Ecosystems
Minkyung Kim, Jaejoon Jung, Wonjae Kim, Yerim Park, Che Ok Jeon, Woojun Park
Journal of Microbiology.2024; 62(11): 933. CrossRef

Carbohydrate metabolism genes dominant in a subtropical marine mangrove ecosystem revealed by metagenomics analysis: Huaxian Zhao , Bing Yan , Shuming Mo , Shiqing Nie , Quanwen Li , Qian Ou , Bo Wu , Gonglingxia Jiang , Jinli Tang , Nan Li , Chengjian Jiang; J. Microbiol. 2019;57(7):575-586. Published online June 27, 2019; DOI: https://doi.org/10.1007/s12275-019-8679-5

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Abstract

Mangrove sediment microorganisms play a vital role in the energy transformation and element cycling in marine wetland ecosystems. Using metagenomics analysis strategy, we compared the taxonomic structure and gene profile of the mangrove and non-mangrove sediment samples at the subtropical estuary in Beibu Gulf, South China Sea. Proteobacteria, Bacteroidetes, and Firmicutes were the most abundant bacterial phyla. Archaeal family Methanosarcinaceae and bacterial genera Vibrio and Dehalococcoides were significantly higher in the mangrove sediments than in the nonmangrove sediments. Functional analysis showed that “Carbohydrate metabolism” was the most abundant metabolic category. The feature of carbohydrate-active enzymes (CZs) was analyzed using the Carbohydrate-Active EnZymes Database. The significant differences of CZs between mangrove and non-mangrove sediments, were attributed to the amounts of polyphenol oxidase (EC 1.10.3.-), hexosyltransferase (EC 2.4.1.-), and β-N-acetylhexosaminidase (EC 3.2.1.52), which were higher in the mangrove sediment samples. Principal component analysis indicated that the microbial community and gene profile between mangrove and non-mangrove sediments were distinct. Redundancy analysis showed that total organic carbon is a significant factor that affects the microbial community and gene distribution. The results indicated that the mangrove ecosystem with massive amounts of organic carbon may promote the richness of carbohydrate metabolism genes and enhance the degradation and utilization of carbohydrates in the mangrove sediments.

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Habitat variations of sediment microbial community structure and functions and the influential environmental factors in a Ramsar protected wetland in South China
Kit-Ling Lam, Nora Fung-Yee Tam, Steven Jing-Liang Xu, Wing-Yin Mo, Yuet-Tung Tse, Kaze King-Yip Lai, Ping-Lung Chan, Fred Wang-Fat Lee
Marine Pollution Bulletin.2024; 209: 117166. CrossRef
Unraveling the role of bacterial communities in mangrove habitats under the urban influence, using a next-generation sequencing approach
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Living in mangroves: a syntrophic scenario unveiling a resourceful microbiome
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BMC Microbiology.2024;[Epub] CrossRef
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Sultan M. Alsharif, Mohamed Ismaeil, Ali M. Saeed, Wael S. El-Sayed
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Xinli Pan, Zhe Li, Shushi Huang, Yuanlin Huang, Qiaozhen Wang, Zhanhua Tao, Wenjin Hu
International Journal of Systematic and Evolutionary Microbiology.2022;[Epub] CrossRef
Role of calcium and magnesium on dramatic physiological and anatomical responses in tomato plants
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Metagenomic analysis of microbial communities and antibiotic resistance genes in spoiled household chemicals
Gang Zhou, Hong-bing Tao, Xia Wen, Ying-si Wang, Hong Peng, Hui-zhong Liu, Xiu-jiang Yang, Xiao-mo Huang, Qing-shan Shi, Xiao-bao Xie
Chemosphere.2022; 291: 132766. CrossRef
Metagenomic insights into surface water microbial communities of a South Asian mangrove ecosystem
Anwesha Ghosh, Ratul Saha, Punyasloke Bhadury
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Diversity, metabolism and cultivation of archaea in mangrove ecosystems
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Marine Life Science & Technology.2021; 3(2): 252. CrossRef
Thermohalobaculum xanthum gen. nov., sp. nov., a moderately thermophilic bacterium isolated from mangrove sediment
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16S rRNA gene amplicon-based metagenomic analysis of bacterial communities in the rhizospheres of selected mangrove species from Mida Creek and Gazi Bay, Kenya
Edith M. Muwawa, Chinedu C. Obieze, Huxley M. Makonde, Joyce M. Jefwa, James H. P. Kahindi, Damase P. Khasa, Marco Fusi
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Microbial enrichment and meta-omics analysis identify CAZymes from mangrove sediments with unique properties
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Tianli Tong, Ruili Li, Minwei Chai, Qian Wang, Yuyin Yang, Shuguang Xie
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Acuticoccus mangrovi sp. nov., with an antibacterial property, isolated from mangrove sediment
Zhe Li, Wenjin Hu, Shushi Huang, Yuanlin Huang, Fei Li, Qiaozhen Wang, Zhanhua Tao, Xinli Pan
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