Halophilic archaea

Aharon Oren*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

10 Scopus citations

Abstract

Three groups of Archaea are known to inhabit hypersaline environments in which salt concentrations exceed 150-200 g -1. The halophilic Archaea of the class Halobacteria are often found in high numbers in natural salt lakes and in solar saltern crystallizer ponds. Due to their pink-red pigmentation caused mainly by carotenoid pigments, their presence is visible by the coloration of the brines. These Archaea generally lead an aerobic chemoorganotrophic life style, but some species are capable of anaerobic photoheterotrophic life driven by light energy absorbed by retinal proteins. Recently the possibility of anaerobic lithoheterotrophic life was identified in a member of the group. Halophilic methanogenic Archaea are known, and these mainly use methylated amines as energy source. Application of cultivation-independent molecular methods has recently resulted in the recognition of a third group of halophilic Euryarchaeota: the Nanohaloarchaea. No members of this group have yet been brought into culture.

Original languageAmerican English
Title of host publicationEncyclopedia of Microbiology
PublisherElsevier
Pages495-503
Number of pages9
ISBN (Electronic)9780128117378
ISBN (Print)9780128117361
DOIs
StatePublished - 1 Jan 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Inc. All rights reserved.

Keywords

  • Compatible solutes
  • Haloalkaliphilic
  • Halobacteria
  • Halobacteriales
  • Haloferacales
  • Halophilic
  • Hypersaline lakes
  • Methanogens
  • Nanohaloarchaea
  • Natrialbales
  • Osmotic adaptation
  • Retinal proteins

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