Cellulomonas endophytica sp. nov., isolated from Gastrodia elata Blume

A Gram-stain-positive, facultatively anaerobic and non-motile strain, designated SYSUP0004^T, was isolated from the tubers of Gastrodia elata Blume collected from Yunnan Province, PR China. The 16S rRNA gene sequence result showed that the strain SYSUP0004^T shared low similarity (97.7 %) with the type strain of Cellulomonas marina. SYSUP0004^T grew at pH 6.0-9.0 (optimum, pH 8.0), temperature 4-30 °C (optimum, 28 °C) and could tolerate NaCl up to 4 % w/v (optimum in the absence of NaCl). The cell-wall peptidoglycan type was A4β with an interpeptide bridge l-ornithine-d-glutamic acid. Cell-wall sugars were mannose, ribose, glucose, galactose and fucose. The menaquinone was MK-9(H₄). The major fatty acids were anteiso-C_15:0, anteiso-C_15 : 1 A, C_16 : 0 and anteiso-C_17 : 0. The polar lipids of SYSUP0004^T were diphosphatidylglycerol, unidentified phosphoglycolipid, phosphatidylinositol mannosides and unidentified glycolipid. The genomic DNA G+C content was 76.5 %. The average nucleotide identity values between SYSUP0004^T and members of the genus Cellulomonas were below the cut-off level (95-96 %) recommended as the ANI criterion for interspecies identity. Thus, based on the above results strain SYSUP0004^T represents a novel species of the genus Cellulomonas, for which the name Cellulomonas endophytica sp. nov. is proposed. The type strain, SYSUP0004^T (=KCTC 49025^T=CGMCC 1.16405^T).

Description of Sphingomonas mesophila sp. nov., isolated from Gastrodia elata Blume

A Gram-staining-negative, strictly aerobic, non-motile strain, SYSUP0001^T, was isolated from tubers of Gastrodia elata Blume. The 16S rRNA gene sequence result indicated that SYSUP0001^T represents a member of the genus Sphingomonas, with the highest sequence similarity (97.7 %) to the type strain of Sphingomonasginsengisoli. SYSUP0001^T grew at 14-37 °C and pH 6-8, with optimum growth at 28 °C and pH 7. Tolerance to NaCl was up to 3 % (w/v) with optimum growth in the absence of NaCl. The respiratory quinone was Q-10. The major fatty acids were C18 : 1ω7c, Summed feature 3 (C16 : 1ω7c/C16 : 1ω6c), and C16 : 0. The polar lipids were diphosphatidylglycerol (DPG), phosphatidylethanolamine (PE), phosphatidylglycerol (PG), sphingoglycolipid (SGL), phosphatidylcholine (PC) and four unidentified polar lipids (L). The DNA G+C content was 67.5 %. The average nucleotide identity (ANI) values between SYSUP0001^T and closely related members of the genus Sphingomonas were below the cut-off level (95-96 %) for species delineation. On the basis of the phenotypic, phylogenetic and chemotaxonomic characterizations, SYSUP0001^T represents a novel species of the genus Sphingomonas, for which the name Sphingomonasmesophila sp. nov. is proposed. The type strain is SYSUP0001^T (=KCTC 62179 ^T=CGMCC 1.16462^T).