Salinirubrum

Abstract

Sa.li.ni.ru'brum. L. fem. pl. n. salinae salterns, salt works; L. neut. adj. rubrum red; N.L. neut. n. Salinirubrum the red archaeon from salt works. Euryarchaeota / Halobacteria / Halobacteriales / Halobacteriaceae/ The genus Salinirubrum is classified with the family Halobacteriaceae , order Halobacteriales , in the class Halobacteria . Cells are pleomorphic under optimal growth conditions, red pigmented, stain Gram‐negative, and lyse in distilled water. Salinirubrum spp. are neutrophile that grow optimally at pH 7.0 and at 37 °C. They are aerobic, chemoorganotrophic extreme halophiles (optimum growth at 2.1–3.1 M NaCl), and can grow on a wide range of carbohydrates, organic acids, and amino acids as carbon and energy source. Sugars are metabolized with the formation of acids. The major polar lipids are the diphytanyl glycerol diether derivatives of phosphatidylglycerol (PG), phosphatidylglycerol phosphate methyl ester (PGP‐Me), and two major glycolipids chromatographically identical to sulfated mannosyl glucosyl diether (S‐DGD‐1) and mannosyl glucosyl diether (DGD‐1). Three unidentified glycolipids are also detected. Currently, the genus consists of one species: Salinirubrum litoreum (the type species of the genus). Salinirubrum strains were isolated from marine solar salterns. DNA G + C content (mol%) : 65.1–65.5. Type species : Salinirubrum litoreum Cui and Qiu 2014, 1456 VP (Effective publication: Cui and Qiu 2014, 138; corrig. Cui and Qiu 2014, 621 as Salinarubrum litoreum ).