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ORIGINAL RESEARCH article

Front. Microbiol.
Sec. Extreme Microbiology
Volume 15 - 2024 | doi: 10.3389/fmicb.2024.1390451

Isolation of highly copper resistant bacteria from deep sea hydrothermal fields and description of a novel species Marinobacter metalliresistant sp. nov

Provisionally accepted
Tong Yu Tong Yu 1Meng Qin Meng Qin 1Zongze Shao Zongze Shao 1Yuemei Zhao Yuemei Zhao 1Xiang Zeng Xiang Zeng 2*
  • 1 third institute of oceanography，Ministry of Natural Resources, Xiamen, China
  • 2 Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China

The final, formatted version of the article will be published soon.

    Hydrothermal vents are rich in heavy metals. Twelve highly copper-resistant bacteria (up to 6-10 mM) were isolated from deep sea hydrothermal fields. They were affiliated with the Pseudoalteromonas (4), Marinobacter (3), Halomonas (2), Psychrobacter (1), and Pseudomonas (1) genus in the γ-Proteobacteria, and the Sphingomonas (1) genus in the α-Proteobacteria. The presence of copper in the medium obviously induced the amount of polysaccharides and proteins in the crude extracellular polymeric substances (EPS) produced by Halomonas sp. CuT 3-1, Pseudoalteromonas sp. CuT 4-3 and Marinobacter metalliresistant CuT 6, which could absorb 40 to 50 mg•g-1 copper. By physiologic and genomic analysis, it revealed that the copper resistance capability exhibited by these strains in hydrothermal fields is likely attributed to the production of exopolymeric substances, such as polysaccharides and proteins, as well as active transport or efflux mechanisms for heavy metals. We further described a novel species, Marinobacter metalliresistant sp. nov. CuT 6T, which exhibited a higher copper resistance and encoded more heavy metal resistance-related genes than other Marinobacter species.

    Keywords: Copper-resistant bacteria, Deep-sea hydrothermal fields, Indian Ocean, Extracellular polymeric substances (EPS), Marinobacter metalliresistant sp.nov

    Received: 23 Feb 2024; Accepted: 05 Aug 2024.

    Copyright: © 2024 Yu, Qin, Shao, Zhao and Zeng. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Xiang Zeng, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China

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