Aromatic Biosynthesis in Higher Plants: IV. THE DISTRIBUTION OF DEHYDROSHIKIMIC REDUCTASE AND DEHYDROQUINASE

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Abstract
The distribution of two of the enzymes involved in the biosynthesis of aromatic compounds in higher plants, namely dehydroshikimic reductase and dehydroquinase, was studied. The two enzymes were found to occur mainly in the supernatant fraction of cauliflower buds. In extracts of pea epicotyls, 30 per cent. of the dehydroshikimic reductase activity was associated with the mitochondria. The activities of the two enzymes in various organs of germinating pea seedlings were measured over an 8-day period. Synthesis of both enzymes was indicated in the roots, shoots, and cotyledons. The two enzymes were found to occur in a variety of plant materials.