Aminobacter anthyllidis, first report of legume symbionts in the genus Aminobacter.
In a recent paper, (Mainaud et al. 2012, sp. nov. Syst Appl Microbiol. 2012 Mar;35(2):65-72. Epub 2012 Jan 4.), Mainaud and colleagues isolated Aminobacter strains from the nodules of Anthyllis vulneraria growing in Zn–Pb mine tailings. These Aminobacter isolates exhibited nodA sequences tightly related with M. loti as the closest nodA relative. The novel bacterial strains efficient on A. vulneraria represented the first occurrence of legume symbionts in the genus Aminobacter. Furthermore, they represent a new species for which the name Aminobacter anthyllidis sp. nov. is proposed (type strain STM4645T = LMG26462T = CFBP7437T). Aminobacter classification: Alphaproteobacteria, Rhizobiales, Phyllobacteriaceae. (Thanks to P.J. Young for pointing out this interesting report)
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Aminobacter vs. Mesorhizobium
A few hours ago, Peter Young commented on his blog about the possibility that Mesorhizobium may become amalgamated within the genus Aminobacter. SSU rRNA sequences of both genera are intermingled. He already pointed that out that at the 2004 North American Rhizobium Conference in Bozeman, Montana, making it clear that a combined genus would, under the rules of precedent, be called Aminobacter. On that occasion Peter already suggested that Mesorhizobium sp. MAFF303099 might become Aminobacter huakuii biovar loti. The paper by Maynaud et al. (2012) may open the eyes to a taxonomist about the opportunity for a quick publication to formalize the proposal of the amalgamation of the two genera ...