Premium
Control of the Biosynthesis of Phenylalanine and Tyrosine in Plant Tissue Cultures: Lack of Repression of Chorismate Mutase
Author(s) -
CHU MARGARET,
WIDHOLM J. M.
Publication year - 1972
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1972.tb03540.x
Subject(s) - chorismate mutase , tyrosine , phenylalanine , biosynthesis , biochemistry , mutase , enzyme , amino acid , biology , aromatic amino acids , chemistry
Tobacco, rice, carrot and tomato tissue cultures were grown in liquid media containing l‐phenylalanine or l‐tyrosine, or both together. The addition of these amino acids increased their respective cellular levels (4–20 fold), but did not lower the level of chorismate mutase, an enzyme in the biosynthetic pathway of phenylalanine and tyrosine. These results indicate that the biosynthesis of phenylalanine and tyrosine in cultured plant cells is not regulated by repression of the synthesis of chorismate mutase by phenylalanine or tyrosine.