HORTICULTURE

Detailed explanation-1: -Indole-3-acetic acid (IAA) is the major naturally occurring auxin and one of the major growth factors in plants. They were the first group of plant growth hormones discovered.

Detailed explanation-2: -Gibberellins are plant hormones involved in regulating stem elongation, germination, dormancy, flowering, and senescence. This hormone is regulated by auxin, another phytohormone produced by Aspergillus. Auxin is involved in regulating cellular growth, differentiation, and expansion.

Detailed explanation-3: -Cytokinin promotes root hair elongation independent of auxin and ethylene.

Detailed explanation-4: -Gibberellins (GAs) are important regulators of diverse aspects of plant growth and development including seed germination, stem and root elongation, leaf expansion, flower and seed development, and the size of the RAM.

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.