- International Journal of Systematic and Evolutionary Microbiology
- Volume 47, Issue 2
f Phylogenetic Relationships and Uncertain Taxonomy of Pedomicrobium Species
- Authors: TRACY L. COX, L. I. SLY*
- * Corresponding author. Phone: 61 7 3365 2396. Fax: 61 7 3365 1566. E-mail: email@example.com.
- Int J Syst Evol Microbiol, April 1997 47: 377-380, doi: 10.1099/00207713-47-2-377
- Subject: Original Papers Relating To Systematic Bacteriology
- Published Online:
The phylogenetic relationships among the species of the genus Pedomicrobium were studied by comparing their 16S rRNA sequences. The Pedomicrobium species form a coherent phylogenetic cluster within the genera of the hyphal budding bacteria in the α-Proteobacteria. The sequences of two strains of Pedomicrobium australicum were obtained from DNAs extracted from nonviable freeze-dried cells, which are the only source of material available, and were found to be almost identical (level of similarity, 99.9%). Overall, the Pedomicrobium species are closely related, with sequence similarities ranging from 96.2 to 99.9%. Pedomicrobium manganicum is phylogenetically the most distantly related species and exhibits the lowest similarity (96.2%) with Pedomicrobium americanum. Australian isolate Pedomicrobium sp. strain ACM 3067, P. americanum, and P. australicum are all very highly related, with similarities greater than 99%. Pedomicrobium sp. strain ACM 3067 is most closely related to P. australicum (level of similarity, 99.6%) and P. americanum (99.4%). These manganese-oxidizing species are more closely related to the iron-oxidizing species Pedomicrobium ferrugineum than to the other manganese-oxidizing species, P. manganicum. Taxonomic uncertainties resulting from the loss of the type culture of P. australicum are discussed.
Copyright © 1997 International Union of Microbiological Societies | Published by the Microbiology Society
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