Auxotrophic Definition

ôksə-trŏfĭk, -trōfĭk
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.
American Heritage
Designating or of a mutant organism requiring more nutritional substances than its prototrophic parent because it has lost the ability to make a certain enzyme.
Webster's New World

(biology) Describing a strain of organism that requires a specific metabolic substance that the parent organism was able to synthesize by itself.


Origin of Auxotrophic

  • Greek auxein to increase auxin –trophic

    From American Heritage Dictionary of the English Language, 5th Edition

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