BIOMOLECULES AND ENZYMES

Detailed explanation-1: -So, the correct answer is ‘Cytokinin’.

Detailed explanation-2: -Cytokinin is the plant hormone which is found to have profound effects in delaying the ageing of plant and thus increases the shelf life of vegtables and fruits. It acts by retarding the destruction and degeneration of chlorophyll and proteins.

Detailed explanation-3: -Cytokinins do a couple other things too: they help delay aging in plants by increasing the amount of new protein that is made and decreasing the amount of old protein that is demolished. Because of this, cytokinins are sprayed in flower shops to keep leaves green and cut flowers fresh.

Detailed explanation-4: -Ethylene and Gibberellins Gibberellins are considered as leaf senescence inhibitors and are able to avoid or delay leaf yellowing. Gibberellins are commonly used as postharvest treatments in several cut flowers to prevent the leaf yellowing (Ferrante et al., 2009).

Detailed explanation-5: -Cytokinins are essential plant hormones. By stimulating cell division, they regulate shoot meristem size, leaf primordia number, and leaf and shoot growth. They can stimulate both the differentiation and the outgrowth of axillary buds. The cytokinins can mediate axillary bud release from apical dominance.