[Methanotrophs of the psychrophilic microbial community of the Russian Arctic tundra]. / Metanotrofy psikhrofil'nogo mikrobnogo soobshchestva zapoliarnoi tundry Rossii.
Mikrobiologiia
; 71(4): 538-44, 2002.
Article
em Ru
| MEDLINE
| ID: mdl-12244726
ABSTRACT
In tundra, at a low temperature, there exists a slowly developing methanotrophic community. Methane-oxidizing bacteria are associated with plants growing at high humidity, such as sedge and sphagnum; no methonotrophs were found in polytrichous and aulacomnious mosses and lichens, typical of more arid areas. The methanotrophic bacterial community inhabits definite soil horizons, from moss dust to peat formed from it. Potential ability of the methanotrophic community to oxidize methane at 5 degrees C enhances with the depth of the soil profile in spite of the decreasing soil temperature. The methanotrophic community was found to gradually adapt to various temperatures due to the presence of different methane-oxidizing bacteria in its composition. Depending on the temperature and pH, different methanotrophs occupy different econiches. Within a temperature range from 5 to 15 degrees C, three morphologically distinct groups of methanotrophs could be distinguished. At pH 5-7 and 5-15 degrees C, forms morphologically similar to Methylobacter psychrophilus predominated, whereas at the acidic pH 4-6 and 10-15 degrees C, bipolar cells typical of Methylocella palustris were mostly found. The third group of methanotrophic bacteria growing at pH 5-7 and 5-10 degrees C was represented by a novel methanotroph whole large coccoid cells had a thick mucous capsule.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Euryarchaeota
País/Região como assunto:
Asia
/
Europa
Idioma:
Ru
Revista:
Mikrobiologiia
Ano de publicação:
2002
Tipo de documento:
Article
País de publicação:
FEDERAÇÃO RUSSA
/
RU
/
RUSIA
/
RUSSIA