Thermolongibacillus altinsuensis gen. nov., sp nov and Thermolongibacillus kozakliensis sp nov., aerobic, thermophilic, long bacilli isolated from hot springs
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Tarih
2014
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Microbiology Soc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Two novel endospore-forming, aerobic bacilli, strains E173a(T) and E265(T), were isolated from soil and sediment samples from Kozakli and Altinsu hot springs, Nevsehir (Turkey). Their young cells in the exponential phase of growth were motile, Gram-stain-positive, straight rods, 0.6-1.1x3.0-8.0 mu m in size, but they became strikingly long, approximately 0.6-1.2 by 9.0-35.0 mu m, after the stationary phase of growth. Cells varied in tests for oxidase, and had a weakly positive reaction for catalase. Both strains could grow between 40 and 70 degrees C, with optimal growth at 60 degrees C (E173a(T)) and 55 degrees C (E265(T)). Growth occurred within the range pH 5.0-11.0 with optimal growth at pH 9.0 (E173a(T)) and pH 8.5 (E265(T)). Strain E173a(T) grew within a salinity range from 0 to 1.5 % (w/v) NaCl with optimal growth at 0.5%, while strain E265(T) grew within the range 0-5.0% (w/v), with an optimum at 3.0%. The new isolates differed from each other in some phenotypic and chemotaxonomic characters as well as repetitive extragenic palindromic element PCR (rep-PCR) fingerprints. 16S rRNA gene sequence similarities suggested distant relationships with other members of the family Bacillaceae (<95.8%), although the two strains showed 97.5% sequence similarity between them, and had 55% relatedness by DNA-DNA hybridization. The DNA G+C contents were 44.8 (E173a(T)) and 43.5 mol% (E265(T)). Moreover, the chemotaxonomic data of E173a(T) and E265(T) [presence of low amounts of meso-diaminopimelic acid, A1 gamma to A1 gamma' cross-linkage types in peptidoglycan, fatty acids including iso-C-15:0 (>60%), iso-C-17:0 and C-16:0] supported the consideration of these isolates as members of a novel genus. Based upon phenotypic, phylogenetic and chemotaxonomic characteristics, it is proposed that new isolates represent a novel genus, Thermolongibacillus gen. nov., with two novel species: Thermolongibacillus altinsuensis sp. nov. (type strain E265(T)=DSM 24979(T)=NCIMB 14850(T)) and Thermolongibacillus kozakliensis sp. nov. (type strain E173a(T)=DSM 24978(T)=NCIMB 14849(T)).
Açıklama
Anahtar Kelimeler
Rapid Method, Phylogenetic Diversity, Deoxyribonucleic-Acid, Geothermal Regions, Dna Hybridization, Alpha-Glucosidase, Lipid-Composition, Bacterium, Proposal, Genera
Kaynak
International Journal of Systematic and Evolutionary Microbiology
WoS Q Değeri
Q3
Scopus Q Değeri
Q1
Cilt
64
