The Effect of Gibberellin A3 and (2-Chloroethyl)-trimethylammoniuin chloride on Assimilate Distribution in Gladiolus in Relation to Corm Growth1

The influence of GA and CCC on growth and assimilate translocationto the various plant organs in gladiolus was studied by labellinga single leaf with ¹⁴CO₂ and following the distribution of theassimilates. GA promotes inflorescence growth by directing assimilatemovement towards the inflorescence at the expense of the corm.CCC has a similar but smaller effect. GA and CCC both promoteassimilate translocation from the labelled leaf during the periodof inflorescence growth. When this period is over and the cormbecomes the main sink, translocation from the labelled leafis promoted by CCC but inhibited by GA. The effect of CCC maybe only partly explained on the basis of an increase in GA turnoverin gladiolus.