|KIM, SOO-JIN - National Academy Of Agricultural Science|
|KWON, SOON-WO - National Academy Of Agricultural Science|
|Rooney, Alejandro - Alex|
Submitted to: International Journal of Systematic and Evolutionary Microbiology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/17/2015
Publication Date: 3/1/2016
Publication URL: https://handle.nal.usda.gov/10113/5695377
Citation: Dunlap, C.A., Kim, S.J., Kwon, S.W., Rooney, A.P. 2016. Bacillus velezensis is not a later heterotypic synonym of Bacillus amyloliquefaciens; Bacillus methylotrophicus, Bacillus amyloliquefaciens subsp plantarum and ‘Bacillus oryzicola’ are later heterotypic synonyms of Bacillus velezensis based on phylogenomics. International Journal of Systematic and Evolutionary Microbiology. 66(3):1212-1217. doi: 10.1099/ijsem.0.000858.
Interpretive Summary: This study compares two important species of biocontrol bacteria and demonstrates they should be the same species based on genomic data. These results will simplify further studies and regulatory activities with the organisms accurately identified. This species comprises a large group of strains that have been commercial developed as plant growth promoters and for control of fungal pathogens.
Technical Abstract: The rhizosphere isolated bacteria belonging to the Bacillus amyloliquefaciens subsp. plantarum and Bacillus methylotrophicus clades are an important group of strains that are used as plant growth promoters and antagonists of plant pathogens. These properties have made these strains the focus of commercial interest. Here, we present the draft genome of the Bacillus methylotrophicus type strain. Comparative genomic analysis showed only minor differences between this strain and the genome of the Bacillus amyloliquefaciens subsp plantarum type strain. The results of morphological, physiological, chemotaxonic and phylogenetic analyses indicate that the type strains of these two taxa are highly similar. In fact, our results show that the Bacillus amyloliquefaciens subsp plantarum type strain does not cluster with other members of the B. amyloliquefaciens taxon. Instead, it clusters well within a clade of strains that are assigned to Bacillus methylotrophicus, including the type strain of that species. Therefore, we propose that the subspecies Bacillus amyloliquefaciens subsp plantarum be reclassified as a later heterotypic synonym of Bacillus methylotrophicus.