Cytokinin

Cytokinin is synthesized in roots and the xylem and phloem carry it through the cell. It stimulates cell division, meaning it stimulates growth from a meristem where mitosis occurs, especially at lateral buds. It also stimulates shoot initiation. Cytokinin causes leaf cell enlargement that stimulate leaf expansion and sometimes enhance the opening of the stomata. Lastly, it converts ethioplasts to chloroplasts during chlorophyll synthesis.
Cytokinin has extended the leaf growth of the bulb and has assisted in chlorophyll synthesis. Also, Cytokinin has stimulated lateral bud growth.