Effect of certain plant growth regulations on the growth and the metabolism of isolated cotyledons and hypocotyls segments.

The present study aims at studying the effects of Gibberellins (GA3 and GA4+7) and of fusicoccin in addition to those of cytokinins (Kinetin and benzylaminipurine) on expansion growth and on certain aspects of metabolism in cucumber cotyledons. The effects have been studied both without and with 5mm pottassium (supplied as KCl) to find out-how far presence of potassium, which also includes expansion, can modify the effect their growth regulations