Bacteria are important dimethylsulfoniopropionate producers in marine aphotic and high-pressure environments

Zheng, Yanfen, Wang, Jinyan, Zhou, Shun, Zhang, Yunhui, Liu, Ji, Xue, Chun-Xu, Williams, Beth, Zhao, Xiuxiu, Zhao, Li, Zhu, Xiao-Yu, Sun, Chuang, Zhang, Hong-Hai, Xiao, Tian, Yang, Gui-Peng, Todd, Jonathan and Zhang, Xiao-Hua (2020) Bacteria are important dimethylsulfoniopropionate producers in marine aphotic and high-pressure environments. Nature Communications, 11. ISSN 2041-1723

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Abstract

Dimethylsulfoniopropionate (DMSP) is an important marine osmolyte. Aphotic environments are only recently being considered as potential contributors to global DMSP production. Here, our Mariana Trench study reveals a typical seawater DMSP/dimethylsulfide (DMS) profile, with highest concentrations in the euphotic zone and decreased but consistent levels below. The genetic potential for bacterial DMSP synthesis via the dsyB gene and its transcription is greater in the deep ocean, and is highest in the sediment.s DMSP catabolic potential is present throughout the trench waters, but is less prominent below 8000 m, perhaps indicating a preference to store DMSP in the deep for stress protection. Deep ocean bacterial isolates show enhanced DMSP production under increased hydrostatic pressure. Furthermore, bacterial dsyB mutants are less tolerant of deep ocean pressures than wild-type strains. Thus, we propose a physiological function for DMSP in hydrostatic pressure protection, and that bacteria are key DMSP producers in deep seawater and sediment.

Item Type: Article
Uncontrolled Keywords: dmsp,organosulfur cycling,marine microbiology,deep ocean,dms
Faculty \ School: Faculty of Science > School of Biological Sciences
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 01 Oct 2020 23:58
Last Modified: 19 Oct 2020 23:55
URI: https://ueaeprints.uea.ac.uk/id/eprint/77064
DOI: 10.1038/s41467-020-18434-4

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