Micromonospora phytophila sp. nov. and Micromonospora luteiviridis sp. nov., isolated as natural inhabitants of plant nodules

Two actinobacterial isolates, strains SG15 T and SGB14 T , were recovered through a microbial diversity study of nitrogen fixing nodules from Pisum sativum plants collected in Salamanca (Spain). The taxonomic status of these isolates was determined using a polyphasic approach and both presented chemotaxonomic and morphological properties consistent with their classification in the genus Micromonospora. For strains SG15 T and SGB14 T , the highest 16S rRNA gene sequence similarities were observed with Micromonospora coxensis JCM 13248 T (99.2 %) and Micromonospora purpureochromogenes DSM 43821 T (99.4 %), respectively. However, strains SG15 T and SGB14 T were readily distinguished from their phylogenetic neighbours both genetically and phenotypically indicating that they represent two new Micromonospora species. The following names are proposed for these species: Micromonosporaphytophila sp. nov. type strain SG15 T (=CECT 9369 T ; =DSM 105363 T ), and Micromonosporaluteiviridis sp. nov. type strain SGB14 T (=CECT 9370 T ; =DSM 105362 T ).