Dynamics of the prokaryotic and eukaryotic microbial community during a cyanobacterial bloom.

Autor:	Qian Y; Graduate School of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan., Okano K; Department of Biological Environment, Faculty of Bioresource Sciences, Akita Prefectural University, Nakano Shimoshinjo, Akita City, Akita, Japan., Kodato M; Faculty of Life Sciences, Toyo University, Gunma, Japan., Arai M; Faculty of Life Sciences, Toyo University, Gunma, Japan., Yanagiya T; Graduate School of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan., Li Q; Faculty of Life Sciences, Toyo University, Gunma, Japan., Amano C; Faculty of Life Sciences, Toyo University, Gunma, Japan.; Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria., Ruike K; Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan., Itayama T; Graduate School of Engineering, Nagasaki University, Nagasaki, Japan., Iwami N; School of Science and Engineering, Meisei University, Hino, Tokyo, Japan., Utsumi M; Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan.; Sustainability Research Center, University of Tsukuba, Ibaraki, Japan., Lei Z; Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan., Zhang Z; Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan., Sugiura N; Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan., Shimizu K; Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan.
Jazyk:	angličtina
Zdroj:	Bioscience, biotechnology, and biochemistry [Biosci Biotechnol Biochem] 2021 Dec 22; Vol. 86 (1), pp. 78-91.
DOI:	10.1093/bbb/zbab179
Abstrakt:	Toxic cyanobacterial blooms frequently develop in eutrophic freshwater bodies worldwide. Microcystis species produce microcystins (MCs) as a cyanotoxin. Certain bacteria that harbor the mlr gene cluster, especially mlrA, are capable of degrading MCs. However, MC-degrading bacteria may possess or lack mlr genes (mlr+ and mlr- genotypes, respectively). In this study, we investigated the genotype that predominantly contributes to biodegradation and cyanobacterial predator community structure with change in total MC concentration in an aquatic environment. The 2 genotypes coexisted but mlr+ predominated, as indicated by the negative correlation between mlrA gene copy abundance and total MC concentration. At the highest MC concentrations, predation pressure by Phyllopoda, Copepoda, and Monogononta (rotifers) was reduced; thus, MCs may be toxic to cyanobacterial predators. The results suggest that cooperation between MC-degrading bacteria and predators may reduce Microcystis abundance and MC concentration. (© The Author(s) 2021. Published by Oxford University Press on behalf of Japan Society for Bioscience, Biotechnology, and Agrochemistry.)
Databáze:	MEDLINE
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