Archives of Microbiology

, Volume 154, Issue 2, pp 105–111

Fervidobacterium islandicum sp. nov., a new extremely thermophilic eubacterium belonging to the “Thermotogales

  • Robert Huber
  • Carl R. Woese
  • Thomas A. Langworthy
  • Jakob K. Kristjansson
  • Karl O. Stetter
Original Papers

DOI: 10.1007/BF00423318

Cite this article as:
Huber, R., Woese, C.R., Langworthy, T.A. et al. Arch. Microbiol. (1990) 154: 105. doi:10.1007/BF00423318

Abstract

An extremely thermophilic anaerobic fermentative eubacterium growing at temperatures between 50 and 80°C (opt.: 65°C) was isolated from an Icelandic hot spring. The cells were Gram-negative motile rods, about 1.8 μm in length, and 0.6 μm in width occurring singly and in pairs. About 50% of the cells formed large spheroids at one end similar to Fervidobacterium nodosum. The new isolate H 21 differed from Fervidobacterium nodosum by a 6 mol % higher GC-content of its DNA (41 mol %), its ability to grow on cellulose, and insignificant DNA homology. The lipids of isolate H 21 were similar to that of members of “Thermotogales”. 16S rRNA sequencing of isolate H 21 and Fervidobacterium nodosum indicated (a) that isolate H 21 represents a new species of the genus Fervidobacterium which we name Fervidobacterium islandicum and (b) that the genus Fervidobacterium belongs to the “Thermotogales” branch.

Key words

EubacteriumThermophileEvolutionFervidobacteriumLipidsThermotoga

Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • Robert Huber
    • 1
  • Carl R. Woese
    • 2
  • Thomas A. Langworthy
    • 3
  • Jakob K. Kristjansson
    • 4
  • Karl O. Stetter
    • 1
  1. 1.Lehrstuhl für MikrobiologieUniversität RegensburgRegensburgFederal Republic of Germany
  2. 2.Department of MicrobiologyUniversity of Illinois at Urbana-ChampaignUrbanaUSA
  3. 3.Department of Microbiology, School of MedicineUniversity of South DakotaVermillionUSA
  4. 4.Institute of BiologyUniversity of IcelandReykjavikIceland