Int J Syst Evol Microbiol 55 (2005), 737-741; DOI 10.1099/ijs.0.63429-0
© 2005 International Union of Microbiological Societies
Paenibacillus hodogayensis sp. nov., capable of degrading the polysaccharide produced by Sphaerotilus natans
Minoru Takeda,
Ichiro Suzuki and
Jun-ichi Koizumi
Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University, Tokiwadai 79-5, Hodogaya, Yokohama 240-8501, Japan
Correspondence
Minoru Takeda
mtake{at}ynu.ac.jp
Sphaerotilus natans is a sheathed bacterium often found in activated sludge that has a bulking problem. A bacterial strain that is able to degrade the extracellular polysaccharide produced by S. natans was isolated. The isolate was a spore-forming, aerobic, rod-shaped bacterium. The Gram reaction was variable or negative. The optimum growth temperature was 30 °C and the optimum pH was 8. The G+C content of the DNA was 55 mol%. The major cellular fatty acid and respiratory quinone were anteiso-C15 : 0 and MK-7, respectively. Phylogenetic analysis based on the 16S rRNA gene indicated that the isolate was a member of the genus Paenibacillus. The nearest relative, with a similarity of 94·2 %, was Paenibacillus koleovorans, a bacterium capable of degrading the sheath of S. natans. The phenotypic characteristics of the isolate were apparently different from those of related species in the genus Paenibacillus. It is proposed that the isolate be designated Paenibacillus hodogayensis sp. nov. The type strain is SGT (=JCM 12520T=KCTC 3919T).
Abbreviations: EPS, extracellular polysaccharide
Published online ahead of print on 22 October 2004 as DOI 10.1099/ijs.0.63429-0.
The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains SGT and MH are AB179866 and AB179867, respectively.
A graph showing growth of strain SGT and EPS degradation, a figure showing the effect of SGT on S. natans sedimentation and a micrograph demonstrating the degradation of the sheath-associated EPS of S. natans are available as supplementary material in IJSEM Online.
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