The effect of sugar supplement on the kinetics of indoleacetic acid-2-14C transport in Zea mays L. Coleoptile segments

Summary The effect of exogenous sugars on the kinetics of 14C-IAA transport in etiolated Zea mays L. coleoptile segments was determined. Supplying sugars through the donor blocks enhances absorption and translocation of the applied 14C-IAA. There was no difference between sucrose, ribose and glucose or the various concentrations of sucrose on auxin transport parameters. Sucrose supplement neither affected the velocity nor the polarity of auxin transport under the present experimental conditions.