盐杆菌纲纲

下级分类

本纲包括以下目：

盐杆菌目 Halobacteriales Grant and Larsen, 1989

盐赤菌目 Halorutilales Durán-Viseras et al. 2023

Halorutilaceae Durán-Viseras et al. 2023

Halorutilus Durán-Viseras et al. 2023

Halorutilus salinus Durán-Viseras et al. 2023

盐富饶菌目 Haloferacales Gupta et al., 2015，为盐杆菌目（Halobacteriales Grant and Larsen 1989）的异名

无色嗜盐菌目 Natrialbales Gupta et al., 2015 为盐杆菌目（Halobacteriales Grant and Larsen 1989）的异名

Haloarchaea (halophilic archaea, halophilic archaebacteria, halobacteria) are a class of archaea under the phylum Euryarchaeota, found in water saturated or nearly saturated with salt. 'Halobacteria' are now recognized as archaea rather than bacteria and are one of the largest groups of archaea. The name 'halobacteria' was assigned to this group of organisms before the existence of the domain Archaea was realized, and while valid according to taxonomic rules, should be updated. Halophilic archaea are generally referred to as haloarchaea to distinguish them from halophilic bacteria.

These halophilic microorganisms require high salt concentrations to grow, with most species requiring more than 2M NaCl for growth and survival.

Haloarchaea can grow aerobically or anaerobically. Parts of the membranes of haloarchaea are purplish in color, and large blooms of haloarchaea appear reddish from retinal-containing bacteriorhodopsin, a protein related to rhodopsin, which it uses to transform light energy into chemical energy by a process unrelated to chlorophyll-based photosynthesis.

Haloarchaea have a potential to solubilize phosphorus. Phosphorus-solubilizing halophilic archaea may well play a role in making phosphorus available to vegetation growing in hypersaline soils. Haloarchaea may also have applications as inoculants for crops growing in hypersaline regions.

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI).

Note: * polyphyletic Natronoarchaeaceae

** polyphyletic Haloferacaceae