1887

Abstract

Two red-pigmented isolates, designated RQ-33 and TU-13, were recovered from hot spring runoffs on the Island of São Miguel in the Azores, Portugal. These organisms have an optimum growth temperature of approximately 45 °C and an optimum pH for growth between 7.5 and 8.5. Based on 16S rRNA gene sequence analysis, the novel isolates were most closely related to the type strain of at 96.4 % pairwise similarity. Cells of the two isolates were non-motile, rod-shaped, Gram-stain-negative, strictly aerobic, and oxidase- and catalase-positive. The major fatty acids were iso-C and C, phosphatidylethanolamine was the major polar lipid, and menaquinone 7 was the major respiratory quinone. Based on phylogenetic analyses, and physiological and biochemical characteristics, these isolates from the Azores represent a novel species of the genus for which the name is proposed with strain RQ-33 ( = DSM 21411 = LMG 24596) as the type strain. The description of the genus is also emended.

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2013-04-01
2019-10-22
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