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Frequent freeze-thaw cycles yield diminished yet resistant and responsive microbial communities in two temperate soils : a laboratory experiment
Stres, Blaž (Avtor), Faganeli, Jadran (Avtor), Tiedje, James M. (Avtor), Philippot, Laurent (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://dx.doi.org/10.1111/j.1574-6941.2010.00951.x Povezava se odpre v novem oknu

Izvleček
Few studies have been conducted on adaptations of microbial communities to low and fluctuating temperatures using environmentally relevant conditions. In this study, six Himalayan and two temperate soils were selected as candidates for low temperature/freeze-thaw (FT) adapted and susceptible soils, respectively. Redundancy analysis with foward selection was used to create a model of environmental parameters explaining variability in initial microbial abundance and 4oC activities. The best predictor was soil carbon, explaining more than 74% of data variability (P=0.002), despite significant differences in soil characteristics and environmental history. We tested the hypothesis that the reproduced Hymalayan FT fluctuations selected physiologically similar communities in distinct soils. Microcosmos were experimentally subjected to two separate 50 and 60 FT-cycle experiments. Significant decrease in abundance, 4oC basal respiration and drastic rearrangements in community-level physiological profiles (CLPP) were observed in microcosmos with temperate soils until 40 FT cycles. CLPP remained distinct from those of the Himalayan soils. Minor changes were observed in the Hymalayan soils confirming that microbial populations with physiological traits consistent with the non-continous permafrost conditions reside in the Himalayan soils whereas the surviving temperature soil microbes actively adjusted to novel environmental conditions.

Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:BF - Biotehniška fakulteta
Leto izida:2010
Št. strani:Str. 323-335
Številčenje:Vol.74, issue 2
UDK:579
ISSN pri članku:0168-6496
DOI:10.1111/j.1574-6941.2010.00951.x Povezava se odpre v novem oknu
COBISS.SI-ID:2671752 Povezava se odpre v novem oknu
Število ogledov:833
Število prenosov:272
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Gradivo je del revije

Naslov:FEMS microbiology, ecology
Skrajšan naslov:FEMS microbiol. ecol.
Založnik:Elsevier
ISSN:0168-6496
COBISS.SI-ID:6301447 Povezava se odpre v novem oknu

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:mikrobiologija, mikrobi, nizke temperature, adaptacija

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