Nitrolancea hollandica gen. nov., sp. nov., a chemolithoautotrophic nitrite- oxidizing bacterium from a bioreactor belonging to the phylum Chloroflexiстатья
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Дата последнего поиска статьи во внешних источниках: 29 декабря 2014 г.
Аннотация:A novel nitrite-oxidizing bacterium (NOB) strain LbT
, was isolated from a nitrifying
bioreactor with high loading of ammonium bicarbonate in a mineral medium with nitrite
as energy source. The cells are oval rods with pointed edges (lancet-shaped), nonmotile,
Gram-positive (by staining and by the cell wall structure) and non-sporeforming. It is an
obligately aerobic chemolitoautotrophic nitrite-oxidizing bacterium (NOB) utilizing nitrite
or formate as energy source and CO2 as carbon source. Ammonium serves as the only
source of assimilated nitrogen. Growth with nitrite was optimal at pH 6.8-7.5 and at 40o
C
(maximum 46o
C). The membrane lipids consist of C20 alkyl 1,2-diols with the dominant
fatty acids as 10MeC18 and C18:1 9. The peptidoglycan lacked meso-DAP but contained
ornithine and lysine. The dominant lipoquinone is MK-8. Phylogenetic analyses of the 16s
rRNA sequence placed strain LbT
into the class Thermomicrobia of the phylum Chloroflexi
with Sphaerobacter thermophilus as the closest relative. On the basis of physiological and
phylogenetic data, it is proposed that strain LbT
represents a new genus and species,
Nitrolancea hollandica gen. nov., sp. nov. (LbT =DSM 23161T=UNIQEM U798T).