Martelella suaedae sp. nov. and Martelella limonii sp. nov., isolated from the root of halophytes.

Two Gram-stain-negative, aerobic and endophytic bacterial strains, designated YC7033T and YC7034T, were isolated from the roots of halophytes (Suaeda maritime and Limonium tetragonum, respectively) inhabiting tidal flats of the Sacheon area, Korea. The phylogenetic analyses of 16S rRNA gene sequences showed that the two strains were closely related to Martelella endophytica YC6887T, Martelella mangrovi BM9-1T, Martelella radicis BM5-7T and Martelella mediterranea DSM 17316T at 97.6-99.1 % similarity. Sequence similarities with the type strains of another closely related genus, Rhizobium, were lower than 95.0 %. Both strains contained ubiquinone-10 (Q-10) as the major respiratory quinone system. The G+C contents of the genomic DNA of strains YC7033T and YC7034T were 52.8 and 62.2 mol%, respectively. The major fatty acids of both strain YC7033T and strain YC7034T were summed feature 8 (C18 : 1ω7c and/or C18 : 1ω6c) and C19 : 0 cyclo ω8c. On the basis of phylogenetic analysis, and biochemical and phenotypic characteristics, strains YC7033T and YC7034T represent two novel species of the genus Martelella, for which the names Martelella suaedae sp. nov. (type strain: YC7033T=KACC 17175T=NBRC 109440T) and Martelella limonii sp. nov. (type strain: YC7034T=KACC 17176T=NBRC 109441T) are proposed, respectively.