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Journal of Bacteriology, July 2000, p. 3867-3869, Vol. 182, No. 13
Department of Ecology and Evolutionary
Biology, University of Arizona, Tucson, Arizona 85721
Received 10 December 1999/Accepted 7 April 2000
In contrast to genome size variation in most bacterial taxa, the
small genome size of Buchnera sp. was shown to be highly conserved across genetically diverse isolates (630 to 643 kb). This
exceptional size conservation may reflect the inability of this
obligate mutualist to acquire foreign DNA and reduced selection for
genetic novelty within a static intracellular environment.
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Decoupling of Genome Size and Sequence Divergence
in a Symbiotic Bacterium
*
Corresponding author. Mailing address: Josephine Bay
Paul Center for Comparative Molecular Biology and Evolution, The Marine Biological Laboratory, 7 MBL St., Woods Hole, MA 02543. Phone: (508)
548-3705, ext. 6650. Fax: (508) 457-4727. E-mail:
jwernegreen{at}mbl.edu.
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