Avtor/Urednik		Avguštin, G; Ramšak, A; Peterka, M
Naslov		Systematics and evolution of ruminal species of the genus Prevotella
Tip		članek
Vir		Folia Microbiol (Praha)
Vol. in št.		Letnik 46, št. 1
Leto izdaje		2001
Obseg		str. 40-4
Jezik		eng
Abstrakt		Bacterial species of the genus Prevotella represent a numerically dominant microbial population in the rumen of cattle. They belong to the phylogenetic division Cytophaga Flexibacter-Bacteroides (CFB) which is a large group of ecologically diverse bacteria with only a few shared traits. The phylogenetic descent from a common ancestor seems to be unquestionable, however, as judged from the small subunit ribosomal RNA analysis. Only 4 ruminal Prevotella species have been described to date, even though the sequence analysis of directly retrieved 16S rRNA genes indicates a large genetic diversity within this group of rumen bacteria. The closest relatives of ruminal Prevotella spp. are not surprisingly other species of the genus Prevotella, typically inhabiting the gastrointestinal tract, oral cavity and genital areas of other animals and man. The previous phylogenetic analysis showed that species of the genus Prevotella can be split into two groups or superclusters, the "ruminal" and the "non-ruminal prevotellas". One of 4 currently described ruminal Prevotella spp., i.e. P. albensis, has been placed outside the supercluster containing ruminal Prevotella spp. and within the supercluster containing the non-ruminal Prevotella spp. However, the number of available small subunit rRNA sequences from this species represents only a fraction of all known ruminal Prevotella sequences.
Deskriptorji		EVOLUTION, MOLECULAR PHYLOGENY PREVOTELLA RUMEN CATTLE DNA, BACTERIAL DNA, RIBOSOMAL RNA, RIBOSOMAL, 16S