Abstract
In this study, a Gram-negative, rod-shaped, endophytic bacterial strain (RS1T) capable of producing large amounts of exopolysaccharides was isolated from a stem of Miscanthus sinensis. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain RS1T is closely related to Mucilaginibacter kameinonensis NBRC 102645T (98.72%), followed by Mucilaginibacter gossypiicola Gh-48T (97.56%) and Mucilaginibacter oryzae DSM 19975T (97.36%). The DNA G + C content of strain RS1T was determined to be 42.80mol%. ANIb and GGDC values from genomic comparison between the genomes of strain RS1T and the related reference species were less than 95% and 70%, respectively. The major cellular fatty acids (more than 10% of total fatty acids) were identified as iso-C15: 0, C16:0, iso-C17:0-3OH and summed feature 3 (C16: 1ω7c and/or iso-C15:02-OH). The only isoprenoid quinone detected was MK-7. Based on the physiological, genotypic and genomic characteristics, strain RS1T is concluded to represent a novel species of the genus Mucilaginibacter, for which the name Mucilaginibacter endophyticus sp. nov. is proposed (type strain RS1T = KCTC 62785T = GDMCC 1.1414T).
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