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Appl. Environ. Microbiol., Apr 1995, 1555-1562, Vol 61, No. 4
CL Moyer, FC Dobbs and DM Karl
The phylogenetic diversity of small-subunit rRNA genes associated with the
domain Bacteria was examined (by using previously defined operational
taxonomic units [C. L. Moyer, F.C. Dobbs, and D. M. Karl, Appl. Environ.
Microbiol. 60:871-879, 1994]; those for Pele's Vents Bacteria are hereafter
abbreviated PVB OTUs) with samples from a microbial mat at an active,
deep-sea hydrothermal vent system. A cluster of phylogenetically related
PVB OTUs (OTUs 2, 3, 6, and 8) was closely affiliated with Thiovulum sp.
contained within the epsilon subclass of the class Proteobacteria and
accounted for 60.5% of the small-subunit rRNA bacterial clone library from
Pele's Vents. A second, smaller cluster of PVB OTUs (OTUs 1 and 11) was
closely affiliated with Xanthomonas sp., contained within the gamma
subclass of the Proteobacteria and accounted for a total of 27.1% of the
bacterial clone library. The remaining five PVB OTUs each accounted for
2.1% of the clones recovered and were affiliated with the following
phylogenetic groups: PVB OTU 5 was a member of the Alteromonas group; PVB
OTU 12 was a member of the Colwellia assemblage; PVB OTU 4 was loosely
determined to be a member of the Thiothrix group, with the endosymbiotic
bacteria from Bathymodiolus thermophilus and Calyptogena magnifica as the
nearest relatives; PVB OTU 10B was a member of the Myxobacterium group; and
PVB OTU 9A was a member of the Paraphyletic assemblage, with the Octopus
Spring microbial mat type K clone as the closest known relative.(ABSTRACT
TRUNCATED AT 250 WORDS)
Copyright © 1995, American Society for Microbiology
Phylogenetic diversity of the bacterial community from a microbial mat at an active, hydrothermal vent system, Loihi Seamount, Hawaii
Department of Oceanography, School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu 96822, USA.
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