title: Clostridiisalibacter paucivorans gen. nov., sp. nov., a novel moderately halophilic bacterium isolated from olive mill wastewater.
abstract: 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-C17:1omega10c or anteiso-C17:1omega3c (19.3%), C14:0 (14.3%), C16:1omega7c (9.9%), C16:1omega7c 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 16S rRNA 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)).
authors.affiliation: Microbiologie et Biotechnologie des Environnements Chauds, UMR D180, IRD, Universités de Provence et de la Méditerranée, 163 Avenue de Luminy, Case 925, F-13288 Marseille Cedex 9, France.
authors.forename: Pierre-Pol
authors.initials: PP
authors.lastname: Liebgott
authors.forename: Manon
authors.initials: M
authors.lastname: Joseph
authors.forename: Marie-Laure
authors.initials: ML
authors.lastname: Fardeau
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Cayol
authors.forename: Enevold
authors.initials: E
authors.lastname: Falsen
authors.forename: Fatima
authors.initials: F
authors.lastname: Chamkh
authors.forename: Abdel-Illah
authors.initials: AI
authors.lastname: Qatibi
authors.forename: Marc
authors.initials: M
authors.lastname: Labat
mesh_terms: D000693:Anaerobiosis; D015373:Bacterial Typing Techniques; D001482:Base Composition; D004269:DNA, Bacterial / Q000032:analysis; D005227:Fatty Acids / Q000032:analysis; D020459:Genes, rRNA; D016936:Gram-Positive Endospore-Forming Bacteria / Q000737:chemistry / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D007220:Industrial Waste; D008969:Molecular Sequence Data; D009018:Morocco; D031658:Olea; D010641:Phenotype; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012965:Sodium Chloride; D013045:Species Specificity; D014865:Waste Disposal, Fluid / Q000379:methods; D014871:Water Microbiology
chemical_list: D004269:DNA, Bacterial; D005227:Fatty Acids; D007220:Industrial Waste; D012336:RNA, Ribosomal, 16S; D012965:Sodium Chloride