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Ligilactobacillus ubinensis sp. nov., a novel species isolated from the wild ferment of a durian fruit (Durio zibethinus).

Yu Chyuan Heng,N. Menon,Binbin Chen,Bryan Zong Lin Loo,Garrett Wei Jie Wong,Amber Ching Han Lim,Shaktheeshwari Silvaraju,S. Kittelmann

Published 2023 in International Journal of Systematic and Evolutionary Microbiology

ABSTRACT

A Gram-stain-positive, rod-shaped, non-spore-forming, catalase-negative, urease-negative, homofermentative and facultatively anaerobic strain, named WILCCON 0076T, was isolated from a wild ferment of pieces of a 'Kampung' durian fruit collected on the island of Ubin (Pulau Ubin), Singapore. The durian had fallen to the ground from a durian tree (Durio zibethinus), on which a group of long-tailed macaques had been observed picking and eating the fruits. Comparative analyses of 16S rRNA gene sequences indicated that WILCCON 0076T potentially represented a novel species within the genus Ligilactobacillus, with the most closely related type strain being Ligilactobacillus agilis DSM 20509T (16S rRNA gene sequence similarity of 97.2 %). Average nucleotide identity and digital DNA-DNA hybridization prediction values were only 86.0% and 18.9 %, respectively. On the basis of the results of a polyphasic approach that included phylogenomic, chemotaxonomic and morphological analyses, we propose a novel species with the name Ligilactobacillus ubinensis sp. nov. (type strain WILCCON 0076T=DSM 114293T=LMG 32698T).

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