Comparative genomic analysis indicates that niche adaptation of terrestrial Flavobacteria is strongly linked to plant glycan metabolism.

摘要: Flavobacteria are important members of aquatic and terrestrial bacterial communities, displaying extreme variations in lifestyle, geographical distribution genome size. They ubiquitous soil, but often strongly enriched the rhizosphere phyllosphere plants. In this study, we compared a root-associated Flavobacterium that recently isolated, physiologically characterized sequenced, to 14 additional genomes, order pinpoint characteristics associated with its high abundance rhizosphere. Interestingly, flavobacterial genomes vary size by approximately two-fold, isolates having predominantly larger than those from environments. Comparative functional gene analysis revealed generally segregated into two distinct clades. Members clade had higher ratio peptide protein utilization genes, whereas were significantly diversity genes involved metabolism carbohydrates such as xylose, arabinose pectin. encoding glycoside hydrolase (GH) families GH78 GH106, responsible for rhamnogalacturonan (exclusively plant hemicelluloses), only present suggesting adaptation strains plant-related carbohydrate metabolism. The Peptidase/GH was (1.7±0.7 9.7±4.7, respectively), supporting concept relation can be used infer lifestyles. Collectively, our research suggests highly adapted metabolism, which appears key their profusion