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Journal Article

Dominance of Sulfuritalea species in nitrate-depleted water of a stratified freshwater lake and arsenate respiration ability within the genus

MPS-Authors

Watanabe,  Tomohiro
external;
Max Planck Institute for Terrestrial Microbiology_others, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

External Resource

https://doi.org/10.1111/1758-2229.12557
(Publisher version)

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Citation

Watanabe, T., Miura, A., Iwata, T., Kojima, H., & Fukui, M. (2017). Dominance of Sulfuritalea species in nitrate-depleted water of a stratified freshwater lake and arsenate respiration ability within the genus. ENVIRONMENTAL MICROBIOLOGY REPORTS, 9(5), 522-527. doi:10.1111/1758-2229.12557.


Cite as: https://hdl.handle.net/21.11116/0000-000E-0EF7-D
Abstract
Facultative autotrophs of the genus Sulfuritalea within the class
Betaproteobacteria have been predicted to be an important bacterial
population in stratified freshwater lakes based on previous PCR-based
studies. Here, we designed a new probe specific for the genus
Sulfuritalea and performed catalysed reporter deposition-fluorescence in
situ hybridisation to enumerate cells of Sulfuritalea species throughout
the water column in a stratified freshwater lake. The cells stained with
the Sulfuritalea-specific probe were detected in all hypoxic water
samples collected in different seasons and years. Their abundance ranged
from 1.4 x 10(4) to 2.1 x 10(5) cells ml(-1), corresponding to 0.5-5.5%
of the total DAPI-stained cells and 2.3-15% of the total bacterial
cells. A high abundance of Sulfuritalea species was recorded in hypoxic
water samples without nitrate, which is the only known anaerobic
electron acceptor for Sulfuritalea. Nitrate-independent anaerobic
respiration was further investigated using a single cultured
representative of this genus, and its growth via arsenate respiration
was experimentally demonstrated. In conclusion, Sulfuritalea species
were found to be a major component of the planktonic bacterial community
in nitrate-depleted hypoxic water, where arsenate respiration is one of
the possible energy metabolisms of Sulfuritalea.