Seasonal changes in the abundance of bacterial genes related to dimethylsulfoniopropionate catabolism in seawater from Ofunato Bay revealed by metagenomic analysis.
T. Kuso, A. Kobiyama, J. Rashid, M.S. Reza, Y. Yamada, Y. Ikeda, D. Ikeda, N. Mizusawa, K. Ikeo, S. Sato, T. Ogata, M. Jimbo, S. Kaga, S. Watanabe, K. Naiki, Y. Kaga, S. Segawa, K. Menita, V. Bajic, T. Gojobori, S. Watabe
Gene, 665, pp. 174-184, (2018)
Keywords
Bacterial functions, DMSP catabolic genes, Metagenomics, Ofunato Bay
Abstract
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Ofunato Bay is located in the northeastern Pacific Ocean area of Japan,
and it has the highest biodiversity of marine organisms in the world,
primarily due to tidal influences from the cold Oyashio and warm Kuroshio Currents. Our previous results from performing shotgun metagenomics indicated that Candidatus Pelagibacter ubique and Planktomarina temperata
were the dominant bacteria (Reza et al., 2018a, 2018b). These bacteria
are reportedly able to catabolize dimethylsulfoniopropionate (DMSP)
produced from phytoplankton into dimethyl sulfide (DMS) or methanethiol (MeSH). This study was focused on seasonal changes in the abundances of bacterial genes (dddP, dmdA)
related to DMSP catabolism in the seawater of Ofunato Bay by BLAST+
analysis using shotgun metagenomic datasets. We found seasonal changes
among the Candidatus Pelagibacter ubique strains, including
those of the HTCC1062 type and the Red Sea type. A good correlation was
observed between the chlorophyll a concentrations and the
abundances of the catabolic genes, suggesting that the bacteria directly
interact with phytoplankton in the marine material cycle system and
play important roles in producing DMS and MeSH from DMSP as signaling
molecules for the possible formation of the scent of the tidewater or as
fish attractants.
Code
DOI: 10.1016/j.gene.2018.04.072
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