title: Meiothermus rufus sp. nov., a new slightly thermophilic red-pigmented species and emended description of the genus Meiothermus.
abstract: Four red-pigmented isolates, with optimum growth temperatures of approximately 55-60 degrees C and an optimum pH for growth between 7.5 and 8.5, were recovered from hot springs in Central France. Phylogenetic analysis of the 16S rRNA gene sequences showed that these organisms represented a new species of the genus Meiothermus. The new isolates could be distinguished from other strains of the species of the genus Meiothermus primarily by the glycolipid profile and fatty acid composition because these organisms lacked the hydroxy fatty acids and the glycolipid variant GL-1a found in all other isolates of the species of Meiothermus examined. On the basis of the results presented here we propose the name Meiothermus rufus for the new species, which is represented by strains CAL-4(T) (=DSM 22234(T)=LMG 24878(T)) and CAL-12 (=DSM 22235=LMG 24879). We also propose emending the genus Meiothermus to include strains that have only one glycolipid instead of two glycolipid variants.
authors: Department of Zoology and Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal.
authors: Luciana
authors: L
authors: Albuquerque
authors: Catarina
authors: C
authors: Ferreira
authors: David
authors: D
authors: Tomaz
authors: Igor
authors: I
authors: Tiago
authors: António
authors: A
authors: Veríssimo
authors: Milton S
authors: MS
authors: da Costa
authors: M Fernanda
authors: MF
authors: Nobre
mesh_terms: D001419:Bacteria / Q000737:chemistry / Q000145:classification* / Q000254:growth & development / Q000302:isolation & purification*; D018407:Bacterial Physiological Phenomena; D015373:Bacterial Typing Techniques; D016000:Cluster Analysis; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D005602:France; D006017:Glycolipids / Q000032:analysis; D045482:Hot Springs / Q000382:microbiology*; D006863:Hydrogen-Ion Concentration; D008969:Molecular Sequence Data; D010802:Phylogeny; D010860:Pigments, Biological / Q000096:biosynthesis; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013696:Temperature
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D006017:Glycolipids; D010860:Pigments, Biological; D012336:RNA, Ribosomal, 16S