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Microterricola viridarii gen. nov., sp. nov., a new member of the family Microbacteriaceae

Atsuko Matsumoto¹, Mayuko Yamada², Satoshi mura^1,2 and Yko Takahashi²

¹ The Kitasato Institute, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8642, Japan
² Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan

Correspondence
Yko Takahashi
ytakaha{at}lisci.kitasato-u.ac.jp

Strain KV-677^T, a Gram-positive, aerobic, motile, rod-shaped bacterium, was isolated from park soil in Tokyo, Japan, and characterized. It grew well at 15–30 °C on nutrient agar and colonies were pale yellow. The cell-wall peptidoglycan contained diaminobutyric acid, glycine, alanine and glutamic acid and the muramic acid acyl type was acetyl. The predominant menaquinone was MK-12. Mycolic acids were not detected. The DNA G+C content was 70 mol%. 16S rRNA gene sequence analysis revealed that strain KV-677^T fell within the cluster of the family Microbacteriaceae and formed a separate lineage joining the genera Salinibacterium, Rhodoglobus, Subtercola and Agreia, showing 95.5–96.9 % sequence similarities with the type strains of the type species of the above genera. However, strain KV-677^T clearly differed from these and other genera with relatively high sequence similarity in its chemotaxonomic characteristics. Therefore, it is proposed that strain KV-677^T represents a novel species in a new genus, Microterricola viridarii gen. nov., sp. nov., in the family Microbacteriaceae. The type strain of Microterricola viridarii is KV-677^T (=NRRL B-24538^T =NBRC 102123^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain KV-677^T is AB282862.

Scanning electron micrographs of cells of KV-677^T cultured on nutrient agar at 27 °C for 8 h and for 10 days are available as supplementary material with the online version of this paper.