Bacillus safensis is a Gram-positive, spore-forming, and rod bacterium, originally isolated from a spacecraft in Florida and California.[2]B. safensis could have possibly been transported to the planet Mars on spacecraft Opportunity and Spirit in 2004.[2] There are several known strains of this bacterium, all of which belong to the Bacillota phylum of Bacteria.[2] This bacterium also belongs to the large, pervasive genus Bacillus. B. safensis is an aerobic chemoheterotroph and is highly resistant to salt[3] and UV radiation. B. safensis affects plant growth, since it is a powerful plant hormone producer, and it also acts as a plant growth-promoting rhizobacteria, enhancing plant growth after root colonization.[3] Strain B. safensis JPL-MERTA-8-2 is (so far) the only bacterial strain shown to grow noticeably faster in micro-gravity environments than on the Earth surface.[4]
^"Genus Bacillus". LPSN. Retrieved 8 July 2019.
^ abcSatomi, Masataka; et al. (2006). "Bacillus safensis sp. nov., isolated from spacecraft and assembly-facility surfaces" (PDF). International Journal of Systematic and Evolutionary Microbiology. 56 (8): 1735–1740. doi:10.1099/ijs.0.64189-0. ISSN 1466-5026. PMID 16902000.
^ abCite error: The named reference strain VK was invoked but never defined (see the help page).
^Coil, David A.; et al. (March 2016). "Growth of 48 built environment bacterial isolates on board the International Space Station (ISS)". PeerJ. 4. e1842. doi:10.7717/peerj.1842. PMC 4806633. PMID 27019789.
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