HORTICULTURE

Detailed explanation-1: -Cytokinins are most abundant in growing tissues, such as roots, embryos, and fruits, where cell division is occurring. Cytokinins also delay senescence (aging) in leaf tissues, promote mitosis (cell division), and stimulate differentiation of the meristem in shoots and roots.

Detailed explanation-2: -Cytokinin promotes nuclear localization of a transcription factor to activate cell division. Organ morphogenesis in plants is largely determined by the rate and patterns of cell division (1) occurring primarily in meristematic tissues such as the shoot and root meristems, and vascular cambium (2).

Detailed explanation-3: -Reason: Cytokinin prevents the breakdown of chlorophyll, proteins and nucleic acid.