Gibberellin-induced Stem Elongation and Apical Bud Growth Acceleration Without Decreased Yield in Broccoli (<i>Brassica oleracea</i> L. var. <i>Italica</i>)

In Japan, broccoli (Brassica oleracea L. var. Italica) is primarily harvested manually. Some Japanese cultivars have short stems, but these heads are more difficult to harvest, and complicate the introduction of mechanical harvesters. Therefore, research focused on strategies control stem length. The present study examined effects plant hormone gibberellin (GA) morphological agronomic traits shoots. cultivar ‘SK9-099’, widely distributed in Japan characterized by a stem, was studied. These experiments were conducted over three cropping seasons, i.e., spring (Exp. 1), summer 2), fall 3), with four GA treatment plots at 0 ppm (Control), 20 ppm, 100 500 ppm. This observed that, average, elongated length from approximately 16.0 cm plot 24.7 for without decreasing yield. addition, accelerated apical bud growth shortened overall period 16 days compared fall, equivalent 20.5% transplantation harvest latter.This highlights several practical benefits application growers, minimizing manual harvesting labor, avoid designing harvesters short-stemmed cultivars, increase field usage efficiency shortening period.