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Emendation of Xanthobacter flavus as a Motile Species

H. Keith Reding^1,, Grace L. M. Croes², Lubbert Dijkhuizen² and Juergen Wiegel^1,*

¹Department of Microbiology and Center for Biological Resource Recovery, Biological Sciences Building, University of Georgia, Athens, Georgia 30602
²Department of Microbiology, University of Groningen, Kerlaan 30, 9751 NN Haren, The Netherlands

^* Corresponding author.

ABSTRACT

Xanthobacter flavus 301^T (T = type strain) and other strains, including H4-14, both of which were previously described as nonmotile, were reproducibly motile and peritrichously flagellated during the log phase when they were cultured in medium lacking tricarboxylic acid cycle intermediates. Therefore, the species description is emended to include motility and flagellation. Similarly, Xanthobacter autotrophicus was found to be flagellated and motile, but this finding was not consistently reproducible and was mainly found with the mutant strain Fe^-s.

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