Morphological and Phylogenetic Diversity of Magnetotactic Bacteria in Pond Lianhua, Beijing

被引：0
|
作者：
He M. [1 ,2 ,3 ,4 ]
Lin W. [2 ,3 ,4 ]
Zhang W. [2 ,3 ,4 ,5 ]
Liu X. [1 ]
Wu H. [1 ]
Xie J. [1 ]
机构：
[1] College of Mineral Processing and Bioengineering, Central South University, Changsha
[2] Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing
[3] Institutions of Earth Science, Chinese Academy of Sciences, Beijing
[4] France-China Joint Laboratory for Evolution and Development of Magnetotactic Multicellular Organisms, Chinese Academy of Sciences, Beijing
[5] College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing
来源：
Xie, Jianping (whitewolf1101@gmail.com) | 2018年 / China University of Geosciences卷 / 43期
关键词：
Diversity; Ecophysiology; Magnetite; Magnetosome; Magnetotactic bacteria;
D O I：
10.3799/dqkx.2018.560
中图分类号：
学科分类号：
摘要：
Magnetotactic bacteria (MTB) bio-mineralize intracellular magnetite (Fe3O4) and/or greigite (Fe3S4) magnetosomes. They are widely distributed in aquatic environments and play important roles in the biogeochemical cycles of Fe, S, C, N and P. Due to their difficulty of cultivation our knowledge on the diversity and environmental function of MTB remains very limited. Here, we have characterized a group of uncultivated MTB from Pond Lianhua in Beijing, China. Light and scanning electron microscopy showed coccoid and vibrioid in cell morphologies. Transmission electron microscopy and energy dispersive spectroscopy indicated that the mineral phase of magnetosomes was magnetite and that some cells of MTB contained large amount of intracellular sulfur and magnesium. 16S rRNA gene-based cultivation-independent analysis has identified seven operational taxonomic units (OTUs) belonging to the Alphaproteobacteria and Gammaproteobacteria in the Proteobacteria phylum. Taken together, our results highlight a high diversity of MTB in environment that may contribute to the geochemical cycling of iron and other elements. © 2018, Editorial Department of Earth Science. All right reserved.
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页码：106 / 114
页数：8
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