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 (ôk′sə-trŏf, -trōf′)
An organism, such as a strain of bacteria, that has lost the ability to synthesize certain substances required for its growth and metabolism as the result of mutational changes.

[Back-formation from auxotrophic.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Microbiology) a mutant strain of microorganism having nutritional requirements additional to those of the normal organism
ˌauxoˈtrophic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
pseudomallei 82 (purine auxotroph) were grown in Luria Bertani (Lennox) broth (Difco) with 4% glycerol (Sigma Aldrich, (22) or on SBA plates.
Auxotroph strains of Salmonella typhemurium (TA-98 and TA-100) were used.
Ma et al., "Targeted therapy with a Salmonella typhimurium leucine-arginine auxotroph cures orthotopic human breast tumors in nude mice," Cancer Research, vol.
Culture conditions for the production of L-glutamic acid from n-paraffins by glycerol auxotroph GL-21.
The genome identified the strain B14 as an auxotroph for L-lysine, L-phenylalanine, L-tyrosine, L-trypthopan, L-phenylalanine, L-isoleucine, L-leucine, L-serine and L-valine.
L-Tryptophan production by analog-resistant mutants derived from a phenylalanine and tyrosine double auxotroph of Corynebacterium glutamicum.
Reactive oxygen species are the major antibacterial against Salmonella Typhymurium purine auxotroph in the phagosome of RAW2647.7 cells.
Similarly Shah [27] used different fermentation media having 2% CaCO3 with maximum Lysine (38, 33 and 28.5g/L) by mutated auxotroph of Corynebacterium glutamicum.
Moat, "Amino acid transport in a polyaromatic amino acid auxotroph of Saccharomyces cerevisiae," Journal of Bacteriology, vol.
gondii is an auxotroph for tryptophan and acquires the needed nutrients from its host cells.
[180] isolated the soil bacterium Mesorhizobium loti, whose genome sequence is known to support growth of the vitamin [B.sub.12] auxotroph Lobomonas rostrata.