Lampropedia puyangensis sp nov., isolated from symptomatic bark of Populus x euramericana canker and emended description of Lampropedia hyalina (Ehrenberg 1832) Lee et al. 2004

摘要

A Gram-stain negative, Neisser-stain negative, aerobic, non-motile, non-spore-forming, slimy, glossy bacterial strain with single or clustered coccoid cells and white colony colour, designated as 2-bin(T), was isolated from cankered bark tissue of Populus x euramericana. The strain was found to grow at 15-40 A degrees C and pH 5-10, with an optimum of 30 A degrees C and pH 8.0. The strain was found to be negative with respect to catalase and positive for oxidase activity, nitrate reduction and Voges-Proskauer reaction. Analysis of 16S rRNA gene sequence data indicated that the isolate belongs to the genus Lampropedia, having sequence similarity of 96.24 % with Lampropedia hyalina ATCC11041(T). DNA-DNA relatedness of strain 2-bin(T) with L. hyalina JCM 21380(T) was 26.7 +/- A 4.6 %. The DNA G+C content of strain 2-bin(T) was determined to be 57 % and the major cellular fatty acids were identified as C-16:0, C-16:1 omega 7c/C-16:1 omega 6c and C-18:1 omega 7c. The polar lipid profile of strain 2-bin(T) was found to contain diphosphatidylglycerol, a glycolipid, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, a phospholipid, phosphatidylmonomethylethanolamine and three unidentified lipids (L1, L2, L3). Based on molecular data and physiological and biochemical characteristics, strain 2-bin(T) is considered to represent a novel species in the genus Lampropedia, for which the name Lampropedia puyangensis sp. nov. is proposed. The type strain is 2-bin(T) (= CFCC 10925(T) = KCTC 32235(T)).