Metabolism of 2,4-Dichlorophenoxyacetic Acid. I. C14O2 Production by Bean Plants Treated with Labeled 2,4-Dichlorophenoxyacetic Acids

Abstract
Radioactive CO2 is produced by plants which have been treated with 2,4-dichlorophenoxyacetic acids containing C14 in either the carboxyl or the methylene positions. The evolution of C14O2 continues at a relatively low rate during a period of several days. The initial rate of production from carboxyl-labeled 2,4-D is several times that from methylene-labelex 2,4-D. No CO2 is evolved from the ring C at position 1.