Hal.al.ka.li.ar.chae'um. Gr. masc. n.
hals
,
halos
salt; N.L. n.
alkali
(from Arabic article
al
and the and Arabic n.
qaliy
ashes of saltwort); N.L. neut. n.
archaeum
(from Gr. masc. adj.
archaios
ancient) archaeon; N.L. neut. n.
Halalkaliarchaeum
a haloalkaliphilic archaeon.
Euryarchaeota / Halobacteria / Haloferacales / Halorubraceae / Halalkaliarchaeum
The genus
Halalkaliarchaeum
, classified within the family
Halorubraceae
, order
Haloferacales
, and within the class
Halobacteria
, consists of pleomorphic flattened rod‐shaped nonmotile cells with a thin monolayer cell wall. Colonies on agar plates incubated aerobically are red‐orange. The single described species of the genus is extremely halophilic, requiring 2.5–5 M Na
+
and growing optimally at 4 M Na
+
, and alkaliphilic, growing at pH 7.8–9.5 with an optimum at pH 8.8–9.0. The optimum temperature is 43°C. It is facultative anaerobe, growing aerobically as a chemoorganoheterotroph on pyruvate and peptone–yeast extract or anaerobically as a chemolithoheterotroph, using H
2
or formate as electron donors, elemental sulfur as electron acceptor, and yeast extract as carbon source. Sugars are not used as carbon and energy source. The respiratory quinone is MK‐8(H
2
). The major polar lipids are C
20
–C
20
and C
25
–C
20
diether dialkylglycerol ethers, with phosphatidylglycerol phosphate methyl ester (PGP‐Me) and phosphatidylglycerol (PG) as the dominant polar lipids.
DNA G + C content (mol%)
: 63.1 (genome sequence).
Type species
:
Halalkaliarchaeum desulfuricum
Sorokin et al. 2019
VP
.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.