1887

Abstract

Two Gram-stain-negative, aerobic and endophytic bacterial strains, designated YC7033 and YC7034, 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 YC6887, Martelella mangrovi BM9-1, Martelella radicis BM5-7 and Martelella mediterranea DSM 17316 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 YC7033 and YC7034 were 52.8 and 62.2 mol%, respectively. The major fatty acids of both strain YC7033 and strain YC7034 were summed feature 8 (C18 : 1 ω7c and/or C18 : 1 ω6c) and C19 : 0 cyclo ω8c. On the basis of phylogenetic analysis, and biochemical and phenotypic characteristics, strains YC7033 and YC7034 represent two novel species of the genus Martelella , for which the names Martelella suaedae sp. nov. (type strain: YC7033=KACC 17175=NBRC 109440) and Martelella limonii sp. nov. (type strain: YC7034=KACC 17176=NBRC 109441) are proposed, respectively.

Keyword(s): endophytic bacteria and halophyte
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2016-10-01
2019-10-20
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