| Summary: | Precise classification of bacteria facilitates prediction of their ecological niche. The genus <i>Enterobacter</i> includes pathogens of plants and animals but also beneficial bacteria that may require reclassification. Here, we propose reclassification of <i>Enterobacter</i> FY-07 (FY-07), a strain that has many plant-growth-promoting traits and produces bacterial cellulose (BC), to the <i>Kosakonia</i> genera. To re-examine the taxonomic position of FY-07, a polyphasic approach including 16S rRNA gene sequence analysis, ATP synthase β subunit (<i>atpD</i>) gene sequence analysis, DNA gyrase (<i>gyrB</i>) gene sequence analysis, initiation translation factor 2 (<i>infB</i>) gene sequence analysis, RNA polymerase β subunit (<i>rpoB</i>) gene sequence analysis, determination of DNA G + C content, average nucleotide identity based on BLAST, in silico DNA–DNA hybridization and analysis of phenotypic features was applied. This polyphasic analysis suggested that <i>Enterobacter</i> sp. FY-07 should be reclassified as <i>Kosakonia oryzendophytica</i> FY-07. In addition, the potential of FY-07 to promote plant growth was also investigated by detecting related traits and the colonization of FY-07 in rice roots.
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