Biosynthesis of Ricinine in Excised Roots of Ricinus communis

Abstract
Carbon-14 labeled ricinine was isolated from excised roots 52 hours after nicotinic acid-7-C14 and succinic acid-2,3-C14 were added to the culture medium. The percent incorporation of nicotinic acid and succinic acid into ricinine was 8.3% and 0.88% respectively. The biosynthesis of ricinine in excised root cultures was not affected by using different precursor levels in the medium.