Mucilaginibacter endophyticus sp. nov.， an endophytic polysaccharide-producing bacterium isolated from a stem of Miscanthus sinensis.

In this study， a Gram-negative， rod-shaped， endophytic bacterial strain (RS1) 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 RS1 is closely related to Mucilaginibacter kameinonensis NBRC 102645 (98.72%)， followed by Mucilaginibacter gossypiicola Gh-48 (97.56%) and Mucilaginibacter oryzae DSM 19975 (97.36%). The DNA G + C content of strain RS1 was determined to be 42.80 mol%. ANIb and GGDC values from genomic comparison between the genomes of strain RS1 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 RS1 is concluded to represent a novel species of the genus Mucilaginibacter， for which the name Mucilaginibacter endophyticus sp. nov. is proposed (type strain RS1 = KCTC 62785 = GDMCC 1.1414).