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Weissella beninensis sp. nov., a novel motile lactic acid bacterium species isolated from submerged cassava fermentations in Benin

¹ Université de Abomey-Calavi;
² Max Rubner Institut;
³ University of Copenhagen, Faculty of Life Sciences

⁴ E-mail: dn{at}life.ku.dk

Four Gram-positive, catalase-negative, short rod-shaped or coccoid, heterofermentative lactic acid bacteria strains (2L24P13T, 1L48P15, 1L24P31 and 1L24P34) with unusual pheno- and genotypic properties were isolated from submerged fermenting cassava on MRS agar. All strains showed motility. The organisms grew at 15 °C, produced DL-lactic acid from glucose with gas formation and produced ammonia from arginine. Acid was produced from D-fructose, D-glucose, D-galactose, D-mannitol, D-mannose, N-acetylglucosamine, D-maltose, D-lactose, melibiose, D-raffinose D-sucrose, but not from D-arabinose, xylose and D-trehalose. 16S rRNA gene sequence analysis revealed that the strains phylogenetically belonged to the genus Weissella and were closely related to Weissella ghanensis. Low DNA-DNA reassociation values were obtained between the strains and the phylogenetically closest related neighbour W. ghanensis. Based on the genetic and phenotypic results, the strains are considered to represent a novel species, for which the name Weissella beninensis is proposed. The type strain is 2L24P13T (= DSM 22752T = LMG 25373T).