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Article Abstract
Five Gran-stain-negative, facultatively anaerobic, motile, bacterial strains were isolated from symptomatic bark tissue of Populus×euramericana canker. Strains grew at 4-41 °C, pH 4-10 and 0-6 % (w/v) salinity. They were positive with respect to catalase activity and negative for oxidase activity, nitrate reduction and the Voges-Proskauer reaction. Analysis of 16S rRNA gene sequences indicated that these five poplar isolates belong to the genus Brenneria, having highest sequence similarity of 95.98 % with Brenneria goodwinii LMG 26270(T). These five isolates formed a single cluster based on multilocus sequence analysis, indicating that they all belong to a single taxon within the genus Brenneria, which was confirmed by DNA-DNA hybridization. The DNA G+C content was 54.9-55.7 mol%, and the main fatty acids were C16 : 0, C18 : 1ω7c, C17 : 0 cyclo and C16 : 1ω7c/iso-C15 : 0 2-OH. Based on these results, we describe a novel species of the genus Brenneria with the proposed name Brenneria populi sp. nov. The type strain is D9-5(T) ( = CFCC 11963(T) = KCTC 42088(T)).
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