Which plant hormone is primarily responsible for promoting cell division, delaying leaf senescence, and stimulating lateral bud growth in tissue culture applications?

💡 Solution & Explanation

Cytokinins are a class of plant growth substances that promote cell division or cytokinesis in plant roots and shoots, often working in conjunction with auxins to regulate plant organ development and delay aging in leaves. Auxins promote apical dominance and root initiation, gibberellins stimulate stem elongation and seed germination, and abscisic acid induces dormancy and stress responses. Skoog and Miller discovered kinetin, the first naturally occurring cytokinin.