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The green non-sulfur bacteria: a deep branching in the eubacterial line of descentRibosomal RNA sequence comparisons define a phylogenetic grouping, the green non-sulfur bacteria and relatives (GNS), known to contain the genera Chloroflexus, Herpetosiphon and Thermomicrobium--organisms that have little phenotypic similarity. The unit is phylogenetically deep, but entirely distinct from any other eubacterial division (phylum). It is also relatively ancient--branching from the common eubacterial stem earlier than any other group of eubacteria reported thus far. The group phenotype is predominantly thermophilic, and its thermophilic members, especially Thermomicrobium, are more slowly evolving than Herpetosiphon, a mesophile. The GNS unit appears significantly older than either the green sulfur bacteria or the cyanobacteria--making it likely that organisms such as Chloroflexus, not the cyanobacteria, generated the oldest stromatolites, which formed over three billion years ago.
Document ID
20040089103
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Oyaizu, H.
(University of Illinois Urbana 61801, United States)
Debrunner-Vossbrinck, B.
Mandelco, L.
Studier, J. A.
Woese, C. R.
Date Acquired
August 21, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Systematic and applied microbiology
Volume: 9
ISSN: 0723-2020
Subject Category
Exobiology
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Exobiology

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