1887

Abstract

A moderately halophilic, strictly anaerobic bacterium, designated 37HS60, was isolated from an olive mill wastewater in southern Morocco (Marrakesh). The cells were straight, motile and stained Gram-positive, forming spherical and terminal spores and with an atypical thick and stratified multilayered cell wall. Major fatty acid components were iso-C17 : 110 or anteiso-C17 : 13 (19.3 %), C14 : 0 (14.3 %), C16 : 17 (9.9 %), C16 : 17 DMA (8.5 %) and C16 : 0 (7.6 %). Strain 37HS60 grew from 20 to 50 °C with an optimum at 40–45 °C, and growth was observed from pH 5.5 to 8.5 with an optimum of 6.8. The salinity range for growth was 10–100 g NaCl l with an optimum at 50 g NaCl l. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain 37HS60 fell within the evolutionary radiation enclosed by cluster XII of the subphylum. Strain 37HS60 exhibited highest 16S rRNA gene sequence similarity of 92.0 % with and 90.6 % with . Moreover, 37HS60 did not grow on basal medium with hexose or pentose sugars as carbon and energy sources. Pyruvate, fumarate and succinate were the best substrates for 37HS60 growth with 1.0 g yeast extract l. The DNA G+C content was 33.0 mol%. Due to its phenotypic and genotypic characteristics, isolate 37HS60 is proposed as a novel species of a new genus, gen. nov., sp. nov. The type strain is 37HS60 (=JCM 14354=CCUG 53849).

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2008-01-01
2019-10-17
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