*2.3.1 Introduction*

Adenine derivatives known as cytokinin have the capacity to stimulate cell proliferation in tissue culture [14]. The most common natural occurrence of cytokinin in plants is zeatin. Cytokinin is transported via the xylem from roots to shoots. Exogenous injections of Cytokinins stimulate cell division in tissue culture when auxin is present. Cytokinins promote shoot initiation in moss; Cytokinins induce bud formation Growth of lateral buds. Cytokinin applications, or the increase in Cytokinin levels in transgenic plants with genes for enhanced Cytokinin synthesis, can cause the release of lateral buds from apical dominance [15].

Natural Example of plant hormone Cytokinins are isopentenyl adenine and Zeatin (corn kernels, coconut milk) while Synthetic: Benzyladenine, Kinetin, thidiazuron, and diphenylurea [16].
