Comparison of partial 16S rRNA gene sequences obtained from activated sludge bacteria.

Abstract:

:The cultivated and uncultivated bacterial communities of an activated sludge plant were studied. Two samples were taken and a total of 516 bacterial isolates were classified into groups using their whole-cell protein patterns. The distribution of bacteria into protein-pattern groups differed significantly between the two samples, suggesting variation in culturable bacterial flora. Partial 16S rRNA gene sequences were determined for representatives of the commonest protein-pattern groups. Most of the sequences obtained were previously unknown, but relatively closely related to known sequences of organisms belonging to the alpha, beta or gamma subclasses of the proteobacteria, the first two subclasses being predominant. This classification of bacteria isolated on a diluted nutrient-rich medium differed from recent culture-dependent studies using nutrient-rich media. The uncultivated bacterial community was studied by analyzing ten partial 16S rRNA gene sequences cloned directly from activated sludge. None of the cloned sequences was identical to those determined for culturable organisms; or to those in the GenBank database. They were, however, related to the alpha or beta subclasses of the proteobacteria, or to the gram-positive bacteria with a high G + C DNA content.

authors

Vainio EJ,Moilanen A,Koivula TT,Bamford DH,Hantula J

doi

10.1007/s002530051017

subject

Has Abstract

pub_date

1997-07-01 00:00:00

pages

73-9

issue

1

eissn

0175-7598

issn

1432-0614

journal_volume

48

pub_type

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