Corticibacterium populi gen. nov., sp. nov., a member of the family Phyllobacteriaceae, isolated from bark of Populus × euramericana.

Two Gram-staining-negative, aerobic, motile, slimy, glossy bacterial strains were isolated from bark tissue of Populus×euramericana. The bacteria grew at 10–37 °C, pH 5–10, with optimal growth at 28–30 °C, pH 6.0–8.0. Both strains grew with 0–3 % (w/v) NaCl. In the maximum-likelihood phylogenetic tree, the two isolates formed a distinct branch within the family Phyllobacteriaceae , and they were not closely related to any of the genera within the family Phyllobacteriaceae . The two novel isolates werepositive for oxidase andcatalase activity. The polar lipids profile revealed diphosphatidylglycerol, phosphatidylcholine, phospholipid, phosphatidylethanolamine, phosphatidylglycerol and five unknown lipids. The major fatty acids were C18 : 1ω7c and C16 : 0. The DNA G+C content was 56.4 mol%. On the basis of phylogenetic, chemotaxonomic and phenotypic data, the two strains represent a novel species belonging to a novel genus of the family Phyllobacteriaceae , for which the name Corticibacterium populi gen. nov., sp. nov. is proposed. The type strain of the type species is 16B10-2-7T (=CFCC 12884T=KCTC 42249T).