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1 Department of Civil and Environmental Engineering, University of Iowa, 4105 Seamans Center, Iowa City, IA 52242, USA
2 Department of Microbiology, University of Iowa, 3-432 Bowen Science Building, Iowa City, IA 52242, USA
3 Department of Biochemistry, Box 357350, University of Washington, Seattle, WA 98195, USA
Correspondence
Benoit Van Aken
bvanaken{at}engineering.uiowa.edu
A pink-pigmented, aerobic, facultatively methylotrophic bacterium, strain BJ001T, was isolated from internal poplar tissues (Populus deltoidesxnigra DN34) and identified as a member of the genus Methylobacterium. Phylogenetic analyses showed that strain BJ001T is related to Methylobacterium thiocyanatum, Methylobacterium extorquens, Methylobacterium zatmanii and Methylobacterium rhodesianum. However, strain BJ001T differed from these species in its carbon-source utilization pattern, particularly its use of methane as the sole source of carbon and energy, an ability that is shared with only one other member of the genus, Methylobacterium organophilum. In addition, strain BJ001T is the only member of the genus Methylobacterium to be described as an endophyte of poplar trees. On the basis of its physiological, genotypic and ecological properties, the isolate is proposed as a member of a novel species of the genus Methylobacterium, Methylobacterium populi sp. nov. (type strain, BJ001T=ATCC BAA-705T=NCIMB 13946T).
Published online ahead of print on 20 February 2004 as DOI 10.1099/ijs.0.02796-0.
The GenBank/EMBL/DDBJ accession number for the 16S and 16S23S IGS rDNA sequence of strain BJ001T is AY251818.
Tissue culture images, photomicrographs, 16S and 16S23S IGS rDNA sequences of BJ001T, sequence similarity matrices, carbon- and nitrogen-source utilization data and enzymic reactions of BJ001T are available as supplementary material in IJSEM Online.
Dedicated to Olivier Van Aken (19641980).
Present address: Genencor International, 925 Page Mill Road, Palo Alto, CA 94304, USA.
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