Studies on flavonoid metabolism. Biosynthesis of (+)-14Ccatechin by the plant Uncaria gambir Roxb

摘要

1. The formation of (+)-[¹⁴C]catechin has been demonstrated in Uncaria gambir after the administration of ¹⁴CO2 and [1-¹⁴C]acetate. 2. By alkaline degradation to phloroglucinol and protocatechuic acid it has been shown that administration of ¹⁴CO2 resulted in equal labelling of the A and B rings of catechin, whereas [1-¹⁴C]-acetate gave rise to labelling largely in the A ring. 3. Incorporation of ¹⁴C from both ¹⁴CO2 and [1-¹⁴C]acetate into (+)-catechin was greater in young than in older leaves.