The Saprotrophic Bacterial Complex in the Raised Peat Bogs of Western Siberia

Golovchenko, A. V.; Sannikova, Yu. V.; Dobrovol’skaya, T. G.; Zvyagintsev, D. G.

doi:10.1007/s11021-005-0091-y

Cited by 12 publications

(5 citation statements)

References 2 publications

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“…On the whole, the peat bogs stud ied significantly differed in the species composition of the microscopic fungi; the Sorensen-Chekanovskii similarity coefficient was 0.30-0.34. The dominance of Trichoderma species in the low moor peat and of the Penicillum genus in the high moor peat was shown in our previous investigations [6,8].…”

Section: Asupporting

confidence: 55%

“…In the last time, the number, taxonomic composi tion, and functions of some groups of microorganisms were studied in peat bogs of the Tomsk region [3,5,6,8,9,11,13,23]. However, complex investigations (the simultaneous determination of the microbial biomass, the proportions of the different groups of microorgan isms in the peat of different types, and the diversity and physiological state of the microorganisms) were not conducted.…”

Section: Introductionmentioning

confidence: 99%

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The structure of the microbial communities in low-moor and high-moor peat bogs of Tomsk oblast

et al. 2012

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The number, structure, and physical state of the microbial communities in high moor and low moor peat bogs were compared. Distinct differences in these characteristics were revealed. The microbial bio mass in the high moor peat exceeded that in the low moor peat by 2-9 times. Fungi predominated in the high moor peat, whereas bacteria were the dominant microorganisms in the low moor peat. The micromyc etal complexes of the high moor peat were characterized by a high portion of dark colored representatives; the complexes of the low moor peat were dominated by fast growing fungi. The species of the Penicillum genus were dominant in the high moor peat; the species of Trichoderma were abundant in the low moor peat. In the former, the bacteria were distinguished as minor components; in the latter, they predominated in the saprotrophic bacterial complex. In the high moor peat, the microorganisms were represented by bacilli, while, in the low moor peat, by cytophages, myxobacteria, and actinobacteria. The different physiological states of the bacteria in the studied objects reflecting the duration of the lag phase and the readiness of the metabolic system to consume different substrates were demonstrated for the first time. The relationships between the trophic characteristics of bacterial habitats and the capacity of the bacteria to consume substrates were established.

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Section: Asupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

The structure of the microbial communities in low-moor and high-moor peat bogs of Tomsk oblast

et al. 2012

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“…(i) Conventional approach. The numbers of CFU obtained on different solid media were quite low and varied between 0.2 ϫ 10 6 and 3.1 ϫ 10 6 CFU per g of wet peat (see Table S2 in the supplemental material), which is in the range of values obtained for Sphagnum peat by other authors (11). This corresponded to 0.02 to 0.36% of total DAPI cell counts.…”

Section: Resultsmentioning

confidence: 60%

Phylogenetic Analysis and In Situ Identification of Bacteria Community Composition in an Acidic Sphagnum Peat Bog

Dedysh

Pankratov

Belova

et al. 2006

Appl Environ Microbiol

281

195

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The Bacteria community composition in an acidic Sphagnum peat bog (pH 3.9 to 4.5) was characterized by a combination of 16S rRNA gene clone library analysis, rRNA-targeted fluorescence in situ hybridization (FISH), and cultivation. Among 84 environmental 16S rRNA gene clones, a set of only 16 cloned sequences was closely related (>95% similarity) to taxonomically described organisms. Main groups of clones were affiliated with the Acidobacteria (24 clones), Alphaproteobacteria (20), Verrucomicrobia (13), Actinobacteria (8), Deltaproteobacteria (4), Chloroflexi (3), and Planctomycetes (3). The proportion of cells that hybridized with oligonucleotide probes specific for members of the domains Bacteria (EUB338-mix) and Archaea (ARCH915 and ARC344) accounted for only 12 to 22% of the total cell counts. Up to 24% of the EUB338-positive cells could be assigned by FISH to specific bacterial phyla. Alphaproteobacteria and Planctomycetes were the most numerous bacterial groups (up to 1.3 ؋ 10 7 and 1

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“…Only a minor part of peat-inhabiting bacteria can be cultured using a surface plating technique and conventional media such as nutrient agar, R2A and others. The numbers of colony forming units (CFUs) obtained by this conventional approach are low and usually range between 10 5 and 10 6 CFUs g −1 of wet peat (Golovchenko et al, 2005 ; Dedysh et al, 2006 ). This corresponds to approximately 0.01–1.0% of total DAPI cell counts.…”

Section: Major Prerequisites For Successful Cultivation Of Peat-inhabmentioning

confidence: 99%

Cultivating Uncultured Bacteria from Northern Wetlands: Knowledge Gained and Remaining Gaps

Dedysh¹

2011

Front. Microbio.

151

143

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Northern wetlands play a key role in the global carbon budget, particularly in the budgets of the greenhouse gas methane. These ecosystems also determine the hydrology of northern rivers and represent one of the largest reservoirs of fresh water in the Northern Hemisphere. Sphagnum-dominated peat bogs and fens are the most extensive types of northern wetlands. In comparison to many other terrestrial ecosystems, the bacterial diversity in Sphagnum-dominated wetlands remains largely unexplored. As demonstrated by cultivation-independent studies, a large proportion of the indigenous microbial communities in these acidic, cold, nutrient-poor, and water-saturated environments is composed of as-yet-uncultivated bacteria with unknown physiologies. Most of them are slow-growing, oligotrophic microorganisms that are difficult to isolate and to manipulate in the laboratory. Yet, significant breakthroughs in cultivation of these elusive organisms have been made during the last decade. This article describes the major prerequisites for successful cultivation of peat-inhabiting microbes, gives an overview of the currently captured bacterial diversity from northern wetlands and discusses the unique characteristics of the newly discovered organisms.

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The Saprotrophic Bacterial Complex in the Raised Peat Bogs of Western Siberia

Cited by 12 publications

References 2 publications

The structure of the microbial communities in low-moor and high-moor peat bogs of Tomsk oblast

The structure of the microbial communities in low-moor and high-moor peat bogs of Tomsk oblast

Phylogenetic Analysis and In Situ Identification of Bacteria Community Composition in an Acidic Sphagnum Peat Bog

Cultivating Uncultured Bacteria from Northern Wetlands: Knowledge Gained and Remaining Gaps

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