BI276 Lecture Notes - Lecture 9: Haloarchaea, Haloferax, Thermoplasmatales
Document Summary
Phylogenetic and metabolic diversity of archaea*: a(cid:396)(cid:272)haea sha(cid:396)e (cid:373)a(cid:374)(cid:455) (cid:272)ha(cid:396)a(cid:272)te(cid:396)isti(cid:272)s (cid:449)ith (cid:271)oth ba(cid:272)te(cid:396)ia a(cid:374)d eukarya, a(cid:396)(cid:272)haea a(cid:396)e split i(cid:374)to t(cid:449)o (cid:373)ajo(cid:396) g(cid:396)oups. Phylogenetic and metabolic diversity of archaea: bioe(cid:374)e(cid:396)geti(cid:272)s a(cid:374)d i(cid:374)te(cid:396)(cid:373)edia(cid:396)(cid:455) (cid:373)eta(cid:271)olis(cid:373) of a(cid:396)(cid:272)haea a(cid:396)e si(cid:373)ila(cid:396) to those fou(cid:374)d i(cid:374) ba(cid:272)te(cid:396)ia. Autotrophy via several different pathways is widespread in archaea. Last long question: how are euks and proks differ. Euryarchaeota (some major groups: extremely halophilic archaea, metha(cid:374)oge(cid:374)i(cid:272) a(cid:396)(cid:272)haea (methane generators, the(cid:396)(cid:373)oplas(cid:373)atales, the(cid:396)(cid:373)o(cid:272)o(cid:272)(cid:272)ales a(cid:374)d metha(cid:374)op(cid:455)(cid:396)us, a(cid:396)(cid:272)haeoglo(cid:271)ales (ales= genus, na(cid:374)oa(cid:396)(cid:272)haeu(cid:373) a(cid:374)d a(cid:272)idulip(cid:396)ofu(cid:374)du(cid:373) Extremely halophilic archaea: haloarchaea, ke(cid:455) ge(cid:374)e(cid:396)a: halo(cid:271)a(cid:272)te(cid:396)iu(cid:373), halofe(cid:396)a(cid:454), nat(cid:396)o(cid:374)o(cid:271)a(cid:272)te(cid:396)iu(cid:373) Have a requirement for high salt concentrations: t(cid:455)pi(cid:272)all(cid:455) (cid:396)e(cid:395)ui(cid:396)e at least (cid:1005). (cid:1009) m (~9%) nacl for growth (at least 9%) Found in artificial saline habitats (e. g. , salted foods), solar salt evaporation ponds, and salt lakes: e(cid:454)tremely hypersaline environments are rare (because extreme conditions- very bare, not varoubale for a lot of organisms, strange conditions, square archaea***)
