As part of a study investigating the rhizosphere and endosphere of the Eastern cottonwood tree, Populus deltoides, a number of isolates were subjected to genome sequencing. The genome-derived 16S rRNA gene sequence of strain CF314 was 97.0 % similar to those of the Chryseobacterium daecheongense and Chryseobacterium polytrichastri type strains, but was essentially equidistant from many other Chryseobacterium type strains. Overall genome similarity metrics (average nucleotide identity, digital DNA-DNA hybridization, average amino acid identity) revealed greatest similarity to the Chryseobacterium daecheongense, Chryseobacterium piperi and Chryseobacterium soldanellicola type strains, but were well below the species thresholds. Strain CF314 had a typical fatty acid composition for Chryseobacterium species and produced flexirubin pigments, but not carotenoids. The genome encodes a number of proteins such as a C-type lectin and terpene synthases that are also found in other plant-associated Bacteroidetes. Based on phenotypic and genomic characteristics of the strain, we propose the new species Chryseobacteriumpopuli. The type strain is CF314=KCTC 62722=LMG 30786.
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