Pontibacter kalidii sp. nov., isolated from rhizosphere soil of Kalidium foliatum

A Gram-negative, aerobic, gliding motile, rod-shaped bacterium, designated XAAS-72^T, was isolated from the rhizosphere soil of Kalidium foliatum sampled in the Xinjiang Uyghur Autonomous Region, PR China. Cells grew at 4–45 °C, pH 5.0–8.0 and 0–8% NaCl, with optimal growth at 20–30 °C, pH 6.0–7.0 and 1–2 % NaCl. Strain XAAS-72^T is closely related to members of the genus Pontibacter, namely Pontibacter korlensis CCTCC AB 206081^T (97.6%) and Pontibacter flavimaris ACCC 19859^T (97.2 %), and <94.6 % related to other currently described Pontibacter strains. The average nucleotide identity values between XAAS-72^T and P. korlensis CCTCC AB 206081^T and P. flavimaris ACCC 19859^T were 77.9 and 86.9 %, respectively; the corresponding digital DNA–DNA hybridization values were 21.7 and 31.8 %. Menaquinone-7 was the predominant respiratory menaquinone. The polar lipids consisted of phosphatidylethanolamine, two unidentified aminophospholipids, two unidentified glycolipids and five unidentified lipids. The major cellular fatty acids were summed feature 4 (containing iso-C_{17: 1} I/anteiso-C_{17: 1} B), summed feature 3 (containing C_{16: 1} ω7c/C_{16: 1} ω6c) and iso-C_{15: 0}. The genome length of strain XAAS-72^T was 5 054 860 bp with a genomic DNA G+C content of 54.5 mol%. The phenotypic and genotypic data suggest that strain XAAS-72^T represents a novel species of the genus Pontibacter, for which the name Pontibacter kalidii sp. nov. is proposed. The strain is XAAS-72^T (CGMCC 16594^T=KCTC 72095^T).