auxotroph


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auxotroph

 [awk´so-trōf]
an auxotrophic organism.

aux·o·troph

(awk'sō-trōf),
A mutant microorganism that requires some nutrient that is not normally required by the organism (prototroph) from which the mutant was derived. Compare: polyauxotroph, monoauxotroph.
[auxo- + G. trophē, nourishment]

auxotroph

(ôk′sə-trŏf, -trōf′)
n.
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.

aux·o·troph

(awk'sō-trōf)
A mutant microorganism that requires some nutrient that is not required by the organism (prototroph) from which the mutant was derived.
[auxo- + G. trophē, nourishment]

auxotroph

a mutant strain of a microorganism that requires growth factors, for example AMINO ACIDS, in addition to those required by the WILD TYPE and therefore will not grow on MINIMAL MEDIUM which will support the growth of the wild type.

auxotroph

an auxotrophic organism.
References in periodicals archive ?
Induction of glycerol auxotrophs and production of L-glutamic acid from n-paraffins.
Nakamaya [16] cultured Brevibacterium and Corynebacterium auxotrophs on 20-40oC and reported maximum lysine production 17- 39g/L at 30oC that is also in support of our optimized temperature.
20 g/dl L-lysine HCl by threonine-valine auxotroph of Brevibacterium lactofermentum.
To achieve maximum production it is necessary to overcome these regulation by developing different auxotrophs.
The parent strain was further mutated to different auxotrophs and the potency for lysine was studied in different nutritional media.
When a polyamine auxotroph is grown under conditions of polyamine starvation, cadaverine is present in the perchloric acid-extractable pool.
1 mM threonine and 10 mM (AEC) and not on without these components were considered as homoserine and threonine auxotroph and resistant to AEC.
In the present study, a uracil auxotroph mutant of S.
To isolate ura3 auxotroph mutants, approximately [10.
The final vector was called pGEM-ura3 and used in transformation of the auxotroph strains.
The majority of yeast auxotroph mutants map to the ino1 locus, the MIPS structural gene (Donahue and Henry, 1981); however, two other loci, ino2 and ino4, also show more than one allelic representative.
Cohen (1991) Indole-3-acetic acid biosynthesis in the mutant maize orange pericarp a tryptophan auxotroph.