Effect of 2,4-dichlorophenoxyacetic acid on utilization of labeled acetate by bean leaf & stem tissues.

AIn increase of C'4O., pro(luction from acetate-i-C'4 and acetate-2-C14 in corn roots by 2,4-D treatment has been reported; the percenitage increase was larger fronm the methbl carbon than from the carboxyl carbon (4). Usinig root tissues it was found that 2,4-D cause(d an increase in the amliouint of glucose catabolized via the pentose phosphate pathxway in root tissues (3). Whlen bean stem tissue was usedl in a ra(lio-respirometric experiment, 2,4-D causedl a dlecrease in the anmounlt of glucose catabolized via the pentose phosphate pathway (1). Since acetate occupies a key positioln in the metabolic patbiways of amino acids, carbohydlrates, and fatty acids, the effect of 2,4-D on acetate utilizatioin in otlher plant tissues vas investigatedl.