The effects of KNO3 and paclobutra-zol (PP333) on direct floral bud formation at the cotyledonary node region of the decapitated cucumber seedlings cultured with nutrient solution of low strength have been studied. Direct formation of the floral buds was found to be closely correlated with KNO3 level. When nutrient solution was supplemented with 0.01 mmol/L KNO3, the higher percentage of direct floral bud formation i. e. 38.33% was got. Effect of PP333 on direct floral bud
formation was more signif...