The involvement of α‐proteobacteria Phenylobacterium in maintaining the dominance of toxic Microcystis blooms in Lake Taihu, China
| Autor: | Wei Shen, Lili Hu, Jiaying Zeng, Lirong Song, Jun Zuo, Lin Li, Nanqin Gan |
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| Rok vydání: | 2020 |
| Předmět: |
China
Microcystis food.ingredient Microcystins Phenylobacterium Microcystin Microbiology Algal bloom 03 medical and health sciences food RNA Ribosomal 16S Humans Dominance (ecology) Microcystis aeruginosa Ecology Evolution Behavior and Systematics 030304 developmental biology chemistry.chemical_classification 0303 health sciences biology 030306 microbiology Ecology Microbiota Caulobacteraceae Eutrophication biology.organism_classification Lakes chemistry Microbial Interactions Proteobacteria |
| Zdroj: | Environmental Microbiology. 23:1066-1078 |
| ISSN: | 1462-2920 1462-2912 |
| DOI: | 10.1111/1462-2920.15301 |
| Popis: | Lake Taihu in China has suffered serious harmful cyanobacterial blooms for decades. The algal blooms threaten the ecological sustainability, drinking water safety, and human health. Although the roles of abiotic factors (such as water temperature and nutrient loading) in promoting Microcystis blooms have been well studied, the importance of biotic factors (e.g. bacterial community) in promoting and meditating Microcystis blooms remains unclear. In this study, we investigated the ecological dynamics of bacterial community, the ratio of toxic Microcystis, as well as microcystin in Lake Taihu. High-throughput 16S rRNA sequencing and principal component analysis (PCA) revealed that the bacteria community compositions (BCCs) clustered into three groups, the partitioning of which corresponded to that of groups according to the toxic profiles (the ratio of toxic Microcystis to total Microcystis, and the microcystin concentrations) of the samples. Further Spearman's correlation network showed that the α-proteobacteria Phenylobacterium strongly positively correlated with the toxic profiles. Subsequent laboratory chemostats experiments demonstrated that three Phenylobacterium strains promoted the dominance of the toxic Microcystis aeruginosa PCC7806 when co-culturing with the non-toxic PCC7806 mcyB- mutant. Taken together, our data suggested that the α-proteobacteria Phenylobacterium may play a vital role in the maintenance of toxic Microcystis dominance in Lake Taihu. |
| Databáze: | OpenAIRE |
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