Effect of bacteria from the bottom water layer of lake baikal on degradation of diatoms

Zakharova, Yulia; Kurilkina, Maria I.; Likhoshvay, Alexander; Shishlyannikov, Sergey M.; Kalyuzhnaya, O. V.; Petrova, Darya P.; Likhoshway, E. V.

doi:10.1134/s0031030113090256

Cited by 15 publications

(2 citation statements)

References 13 publications

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“…One of the dominant species, probably associated with diatoms, was OTU 1692 Agrobacterium , which had statistically significant maximum in section 1. It is important to note, that Agrobacterium from Lake Baikal was found to grow on the medium, which contained hydrolysate of the diatom alga as the only source of carbon, and also could fed on whole algal cells, destroying them (Zakharova et al ).…”

Section: Discussionmentioning

confidence: 99%

Differences in organic matter and bacterioplankton between sections of the largest Arctic river: Mosaic or continuum?

Gladyshev

Kolmakova

Толомеев

et al. 2015

Limnology & Oceanography

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We studied biogeochemical characteristics, including organic carbon and nitrogen contents, fatty acid (FA) composition, stable isotope ratios, and primary production in conjunction with species composition of bacterioplankton, using next generation sequencing, in the Yenisei River along a distance ∼1800 km. Basing on FA composition of particulate organic matter (POM) and on other indicators of sources of POM, the river was subdivided into four sections. The upper section 1, situated in mountain region, was the net source of high‐quality autochthonous organic matter, produced primarily by diatoms and partly consumed by specialized bacteria species. Section 2 in plain taiga was net sink of high quality allochthonous and autochthonous organic matter, produced by cyanobacteria and green algae. Section 3 was net sink of organic matter, primarily allochthonous, consumed by the specialized species of bacteria. The lowest section 4, situated in tundra, was primarily the conduit of recalcitrant terrestrial organic matter, but also the net source of autochthonous organic matter, produced by diatoms. Biogeochemical traits of sections of the Yenisei River evidently shaped dominant species composition of bacterioplankton of these sections. Regarding the biogeochemical and microbiological data, we concluded that the Yenisei River ecosystem complexly combines features of river mosaic, river continuum, and “neutral pipe.”

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Section: Discussionmentioning

confidence: 99%

Differences in organic matter and bacterioplankton between sections of the largest Arctic river: Mosaic or continuum?

Gladyshev

Kolmakova

Толомеев

et al. 2015

Limnology & Oceanography

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“…This effect may be largely due to the presence of the ubiquitous acI-A clade in freshwater. Zakharova et al (2013) studied bacteria associated with diatom degradation in the near bottom water layer of Lake Baikal and found high beta-galactosidase activity. They also found that Actinobacteria were a significant portion of the bacterial community.…”

Section: Ecogenomics Of the Aci Lineagementioning

confidence: 99%

Comparative single-cell genomics reveals potential ecological niches for the freshwater acI Actinobacteria lineage

et al. 2014

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Members of the acI lineage of Actinobacteria are the most abundant microorganisms in most freshwater lakes; however, our understanding of the keys to their success and their role in carbon and nutrient cycling in freshwater systems has been hampered by the lack of pure cultures and genomes. We obtained draft genome assemblies from 11 single cells representing three acI tribes (acI-A1, acI-A7, acI-B1) from four temperate lakes in the United States and Europe. Comparative analysis of acI SAGs and other available freshwater bacterial genomes showed that acI has more gene content directed toward carbohydrate acquisition as compared to Polynucleobacter and LD12 Alphaproteobacteria, which seem to specialize more on carboxylic acids. The acI genomes contain actinorhodopsin as well as some genes involved in anaplerotic carbon fixation indicating the capacity to supplement their known heterotrophic lifestyle. Genome-level differences between the acI-A and acI-B clades suggest specialization at the clade level for carbon substrate acquisition. Overall, the acI genomes appear to be highly streamlined versions of Actinobacteria that include some genes allowing it to take advantage of sunlight and N-rich organic compounds such as polyamines, di-and oligopeptides, branched-chain amino acids and cyanophycin. This work significantly expands the known metabolic potential of the cosmopolitan freshwater acI lineage and its ecological and genetic traits.

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Bacterial Communities in Areas of Oil and Methane Seeps in Pelagic of Lake Baikal

et al. 2018

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Effect of bacteria from the bottom water layer of lake baikal on degradation of diatoms

Cited by 15 publications

References 13 publications

Differences in organic matter and bacterioplankton between sections of the largest Arctic river: Mosaic or continuum?

Differences in organic matter and bacterioplankton between sections of the largest Arctic river: Mosaic or continuum?

Comparative single-cell genomics reveals potential ecological niches for the freshwater acI Actinobacteria lineage

Bacterial Communities in Areas of Oil and Methane Seeps in Pelagic of Lake Baikal

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