TY - JOUR
AU - Fink, G R
AB - Although amino acid auxotrophs are among the most frequently isolated mutations in microorganisms, no mutants that require amino acids have been isolated at the whole plant level. Tryptophan-requiring mutants of the cruciferous plant Arabidopsis thaliana have now been isolated by selecting for resistance to 5-methylanthranilic acid. The tryptophan requirement of one mutant, trpl-1, results from a defect in the second step of the tryptophan pathway catalyzed by anthranilate phosphoribosyl transferase. Mutant trpl-1 plants are highly fluorescent and aromatic because they accumulate anthranilic acid and anthranilate beta-glucoside. Plants homozygous for the trpl-1 mutation exhibit a syndrome of morphological defects suggestive of a defect in the biosynthesis, metabolism, or localization of a tryptophan derivative such as auxin. All of these morphological phenotypes cosegregate with the tryptophan requirement as a simple Mendelian recessive trait.
TI - Tryptophan-Requiring Mutants of the Plant Arabidopsis thaliana.
JF - Science (New York, N.Y.)
DO - 10.1126/science.240.4850.305
DA - 2010-07-02
UR - https://www.deepdyve.com/lp/pubmed/tryptophan-requiring-mutants-of-the-plant-arabidopsis-thaliana-i37Lcbsesw
SP - 305
EP - 310
VL - 240
IS - 4850
DP - DeepDyve
ER -