EVERYDAY SCIENCE

Detailed explanation-1: -IAA (an auxin) regulates cell division and expansion, vascular differentiation, lateral root development, and apical dominance. Cytokinins are adenine derivatives first identified by their ability to promote cytokinesis.

Detailed explanation-2: -Auxin is a crucial growth regulator that governs plant development and responses to environmental perturbations. It functions at the heart of many developmental processes, from embryogenesis to organ senescence, and is key to plant interactions with the environment, including responses to biotic and abiotic stimuli.

Detailed explanation-3: -The chemical name of auxin is indole-3-acetic acid (IAA).

Detailed explanation-4: -Since 1937, gibberellin (GA), ethylene, cytokinin, and ab-scisic acid (ABA) have joined auxin as phytohormones, and together, they are regarded as the “classical five” (Fig-ure 1).

Detailed explanation-5: -Auxin is a key regulator of plant growth and development, orchestrating cell division, elongation and differentiation, embryonic development, root and stem tropisms, apical dominance, and transition to flowering.