Journal of Microbiology

Ke Dong

2 Articles

Patterns and drivers of Vibrio isolates phylogenetic diversity in the Beibu Gulf, China: Xing Chen , Hong Du , Si Chen , Xiaoli Li , Huaxian Zhao , Qiangsheng Xu , Jinli Tang , Gonglingxia Jiang , Shuqi Zou , Ke Dong , Jonathan M. Adams , Nan Li , Chengjian Jiang; J. Microbiol. 2020;58(12):998-1009. Published online October 23, 2020; DOI: https://doi.org/10.1007/s12275-020-0293-z

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Members of the genus Vibrio are ubiquitous in aquatic environments and can be found either in a culturable or a viable but nonculturable (VBNC) state. Despite widespread concerns as to how to define the occurrence and dynamics of Vibrio populations by culture-independent approaches, further physiological research and relevant biotechnological developments will require the isolation and cultivation of the microbes from various environments. The present work provides data and perspectives on our understanding of culturable Vibrio community structure and diversity in the Beibu Gulf. Finally, we isolated 1,037 strains of Vibrio from 45 samples and identified 18 different species. Vibrio alginolyticus, V. cyclitrophicus, V. tasmaniensis, V. brasiliensis, and V. splendidus were the dominant species that had regional distribution characteristics. The correlation between the quantitative distribution and community structure of culturable Vibrio and environmental factors varied with the Vibrio species and geographical locations. Among them, salinity, nitrogen, and phosphorus were the main factors affecting the diversity of culturable Vibrio. These results help to fill a knowledge gap on Vibrio diversity and provide data for predicting and controlling pathogenic Vibrio outbreaks in the Beibu Gulf.

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Environmental factors that regulate Vibrio spp. abundance and community structure in tropical waters
Yi You Wong, Choon Weng Lee, Chui Wei Bong, Joon Hai Lim, Ching Ching Ng, Kumaran Narayanan, Edmund Ui Hang Sim, Ai-jun Wang
Anthropocene Coasts.2024;[Epub] CrossRef
Co-occurrence of chromophytic phytoplankton and the Vibrio community during Phaeocystis globosa blooms in the Beibu Gulf
Qiangsheng Xu, Pengbin Wang, Jinghua Huangleng, Huiqi Su, Panyan Chen, Xing Chen, Huaxian Zhao, Zhenjun Kang, Jinli Tang, Gonglingxia Jiang, Zhuoting Li, Shuqi Zou, Ke Dong, Yuqing Huang, Nan Li
Science of The Total Environment.2022; 805: 150303. CrossRef
Virulence mechanisms of vibrios belonging to the Splendidus clade as aquaculture pathogens, from case studies and genome data
Weiwei Zhang, Chenghua Li
Reviews in Aquaculture.2021; 13(4): 2004. CrossRef

Bacillus kyonggiensis sp. nov., Isolated from Soil of a Lettuce Field: Ke Dong , Sangseob Lee; J. Microbiol. 2011;49(5):776-781. Published online November 9, 2011; DOI: https://doi.org/10.1007/s12275-011-1218-7

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Abstract PDF

A Gram-positive, rod-shaped, motile, endospore-forming bacterial strain, designated NB22T, was isolated from soil of a lettuce field in Kyonggi province, South Korea, and was characterized by using a polyphasic taxonomic approach. This novel isolate grew optimally at 30-37°C and pH 8-9. It grew in the presence of 0-4% NaCl (optimum, 1-2%). Comparative 16S rRNA gene sequence analysis showed that strain NB22T was closely related to members of the genus Bacillus and fell within a coherent cluster comprising B. siralis 171544T (98.1%) and B. korlensis ZLC-26T (97.3%). The levels of 16S rRNA gene sequence similarity with respect to other Bacillus species with validly published names were less than 96.4%. Strain NB22T had a genomic DNA G+C content of 36.3 mol% and the predominant respiratory quinone was MK-7. The peptidoglycan contained meso-diaminopimelic acid. The major cellular fatty acids were iso-C15:0, anteiso-C15:0, C14:0, and C16:0. These chemotaxonomic results supported the affiliation of strain NB22T to the genus Bacillus, and the low DNA-DNA relatedness values and distinguishing phenotypic characteristics allowed genotypic and phenotypic differentiation of strain NB22T from recognized Bacillus species. On the basis of the evidence presented, strain NB22T is considered to represent a novel species of the genus Bacillus, for which the name Bacillus kyonggiensis sp. nov. is proposed. The type strain is NB22T (=KEMB 5401-267T =JCM 17569T).

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