Genetic and mutant studies indicate that the apical dominance of plant was controlled by hormone.Auxin and cytokinin interacted with axillary bud outgrowth or reproductive development.

• 摘要分子生物学中对基因与突变体的研究表明植物的顶端优势现象是受激素的调控的，其中生长素抑制侧芽的生长，而细胞分裂素促进侧芽的起始，二者的比值对植物的生长更加重要。