Chitinophaga oryziterrae sp. nov., isolated from the rhizosphere soil of rice (Oryza sativa L.)
2012
Chung, Eu Jin | Park, Tae Soon | Jeon, Che Ok | Chung, Young Ryun
A novel bacterial strain, YC7001T, was isolated from the rhizosphere soil of rice collected at Jinju, Korea, and was characterized using a polyphasic approach. Cells of strain YC7001T were Gram-negative-staining, yellow-pigmented, rod-shaped, aerobic, heterotrophic and non-motile. Strain YC7001T grew optimally at 25–30 °C, pH 5.0–8.0 and degraded gelatin, cellulose and chitin. Phylogenetic analyses based on 16S rRNA gene sequences indicated that strain YC7001T belonged to the genus Chitinophaga in the family Chitinophagaceae. The most closely related species were Chitinophaga sancti NBRC 15057T (96.9 %), Chitinophaga ginsengisoli Gsoil 052T (95.9 %), Chitinophaga pinensis DSM 2588T (95.7 %), Chitinophaga filiformis IFO 15056T (95.7 %) and Chitinophaga niabensis JS13-10T (95.0 %). The DNA–DNA relatedness value of strain YC7001T with C. sancti NBRC 15057T was 15.2±0.6 %. Strain YC7001T contained MK-7 as the major menaquinone and homospermidine as the major polyamine. The major fatty acids of strain YC7001T were C15 : 0 iso, C16 : 1ω5c and C17 : 0 iso 3-OH. The polar lipids were phosphatidylethanolamine, unknown aminolipids and unknown lipids. The total genomic DNA G+C content was 41.3 mol%. On the basis of phenotypic, chemotaxonomic and phylogenetic analyses, strain YC7001T represents a novel species of the genus Chitinophaga, in the family Chitinophagaceae, for which the name Chitinophaga oryziterrae sp. nov. is proposed. The type strain is YC7001T ( = KACC 14533T = JCM 16595T).
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