Liebgott Pierre-Pol auteur aut IRD Joseph Manon auteur aut IRD Fardeau Marie-Laure auteur aut IRD Cayol Jean-Luc auteur aut IRD Falsen E. auteur aut IRD Chamkh F. auteur aut IRD Qatibi A. A. auteur aut IRD Labat Marc auteur aut IRD text journalArticle eng text/pdf reformatted digital access A moderately halophilic, strictly anaerobic bacterium, designated 37HS60(T), 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: 1 omega 10c or anteiso-C17: 1 omega 3c (19.3%), C14:0 (14.3%), C16: 1 omega 7c (9.9%), C16: 1 omega 7c DMA (8.5%) and C16:0 (7.6%). Strain 37HS60(T) grew from 20 to 50 degrees C with an optimum at 40-45 degrees 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(-1) with an optimum at 50 g NaCl l(-1). Phylogenetic analysis based on 1 6SrRNA gene sequences revealed that strain 37HS60(T) fell within the evolutionary radiation enclosed by cluster XII of the Clostridium subphylum. Strain 37HS60(T) exhibited highest 16S rRNA gene sequence similarity of 92.0% with Caloranaerobacter azorensis and 90.6% with Clostridium purinilyticum. Moreover, 37HS60(T) 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(T) growth with 1.0 g yeast extract l-1. The DNA G + C content was 33.0 mol%. Due to its phenotypic and genotypic characteristics, isolate 37HS60(T) is proposed as a novel species of a new genus, Clostridiisalibacter paucivorans gen. nov., sp. nov. The type strain is 37HS60(T) (= JCM 14354(T) = CCUG 53849(T)). specialized 084 58 1 61-67 2008 1466-5026 https://www.documentation.ird.fr/hor/PAR00002183 10.1099/ijs.0.65182-0 1466-5026 [F B010088402] https://www.documentation.ird.fr/hor/PAR00002183 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2023-07/010088402.pdf IRD - Base Horizon / Pleins textes 2008-03-31 2023-12-21 PAR00002183 fre