Rhodothalassium.

Imhoff, Johannes F. (2021) Rhodothalassium. In: Bergey's Manual of Systematics of Archaea and Bacteria. . Wiley, Chichester, p. 1. DOI 10.1002/9781118960608.gbm00875.pub2.

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Abstract

Rho.do.tha.las'si.um. Gr. neut. n. rhodon, the rose; Gr. masc. adj. thalassios, belonging to the sea; N.L. neut. n. Rhodothalassium, the rose belonging to the sea.

Proteobacteria / Alphaproteobacteria / Rhodothalassiales / Rhodothalassiaceae / Rhodothalassium

The genus Rhodothalassium is represented by a single species and is the only genus of the Rhodothalassiaceae family and Rhodothalassiales order. It is characterized by vibrioid- to spiral-shaped cells which multiply by binary fission and are motile by means of flagella. Internal photosynthetic membranes are present as lamellar stacks lying parallel to the cytoplasmic membrane. Photosynthetic pigments are bacteriochlorophyll a and carotenoids of the spirilloxanthin series. Ubiquinones and menaquinones with 10 isoprene units (Q-10 and MK-10) are present. Growth occurs preferably photoheterotrophically under anoxic conditions in the light. Most strains also grow chemoorganotrophically under oxic conditions in the dark. Rhodothalassium species are obligately halophilic, require NaCl or sea salt for growth, and live in anoxic zones of hypersaline environments such as salterns, salt lakes, and evaporated coastal lagoons that are exposed to the light.

DNA G + C content (mol%): 68.5–69.0 (WGS), 60.0–62.8 (HPLC).

Type species: Rhodothalassium salexigens Imhoff et al. 1998VP (basonym: Rhodospirillum salexigens Drews 1981, VL9).

Document Type: Book chapter
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-MS Marine Symbioses
Main POF Topic: PT6: Marine Life
Publisher: Wiley
Date Deposited: 14 Jan 2022 12:36
Last Modified: 17 Jan 2022 09:08
URI: https://oceanrep.geomar.de/id/eprint/54864

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