Abstract
Ha.lo.ru.bel'lus. Gr. n. hals , halos , salt; L. masc. adj. rubellus reddish; N.L. masc. n. Halorubellus reddish salt organism. Euryarchaeota / Halobacteria / Halobacteriales / Halobacteriaceae The genus Halorubellus is classified with the family Halobacteriaceae , order Halobacteriales , in the class Halobacteria . Cells are pleomorphic under optimal growth conditions, red pigmented, stain Gram‐negative, motile, and lyse in distilled water. Halorubellus spp. are neutrophiles that grow optimally at pH 7.0 and at 37 °C. They are aerobic, chemoorganotrophic extreme halophiles (optimum growth at 3.1 M NaCl) and can grow in defined media on a narrow range of substrates (organic acids, carbohydrates, and amino acids). Sugars are metabolized with formation of acids by some strains. The major polar lipids are the diphytanyl glycerol diether derivatives of phosphatidic acid (PA), phosphatidylglycerol (PG), phosphatidylglycerol phosphate methyl ester (PGP‐Me), and three major glycolipids chromatographically identical to S‐TGD‐1 (sulfated galactosyl mannosyl glucosyl diether), S‐DGD‐1 (sulfated mannosyl glucosyl diether), and DGD‐1 (mannosyl glucosyl diether), respectively; an unidentified lipid may also be detected. Currently, the genus consists of two species: Halorubellus salinus (the type species of the genus) and Hrb. litoreus . The current known Halorubellus strains were isolated from a marine solar saltern. DNA G + C content (mol%) : 67.2–67.3. Type species : Halorubellus salinus Cui, Mou, Yang, Zhou, Liu and Zhou 2012, 2 VP (Effective publication: Cui, Mou, Yang, Zhou, Liu and Zhou 2012, 33).
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