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Related to auxotrophy: prototrophy, auxotrophs


 (ôk′sə-trŏf′ĭk, -trō′fĭk)
Requiring one or more specific substances for growth and metabolism that the parental organism was able to synthesize on its own. Used with respect to organisms, such as strains of bacteria, algae, or fungi, that can no longer synthesize certain growth factors because of mutational changes.

[Greek auxein, to increase; see auxin + -trophic.]

aux·ot′ro·phy (ôk-sŏt′rə-fē) n.


the inability to synthesize particular growth factors, due to mutational changes
References in periodicals archive ?
coli showed auxotrophy that can be suppressed by a rpoB mutation ([beta]T563P), which also suppresses the auxotrophy of a (p)ppGpp negative strain, called [(p)ppGpp.
aureus, confirmed by polymerase chain reaction amplification of the nuc and coa genes as well as by determination of the strain's auxotrophy for hemin.
fischeri strain ESR1, that the host squid provides certain amino acids to support the bacteria, and auxotrophy for amino acids in the bacteria can lower the level of its colonization of the squid light organ.