1887

Abstract

Thirteen strains of endospore-forming bacteria were isolated from geothermal soils at Cryptogam Ridge, the north-west slope of Mt Melbourne, and at the vents and summit of Mt Rittmann in northern Victoria Land, Antarctica. 16S rRNA gene sequencing, SDS-PAGE and routine phenotypic characterization tests indicated that the seven isolates from the north-west slope of Mt Melbourne represent a novel species of and that the six isolates from Cryptogam Ridge and the vents and summit of Mt Rittmann represent a novel species of . strains were not isolated from the sites at Mt Rittmann or Cryptogam Ridge and strains were not isolated from the north-west slope of Mt Melbourne. Preliminary metabolic studies revealed that -glutamic acid, although not essential for growth, was utilized by both species. The species possessed an uptake system specific for -glutamic acid, whereas the species possessed a more general uptake system capable of transporting other related amino acids. Both species utilized a K antiport system and similar energy systems for the uptake of -glutamic acid. The rate of uptake by the species type strain was 20-fold greater than that shown by the species type strain. The names sp. nov. and sp. nov. are proposed for the novel taxa; the type strains are Logan B-1657 (=LMG 22481=CIP 108307) and Logan B-1599 (LMG 22483=CIP 108308), respectively.

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2005-05-01
2020-09-25
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