Question

Indicate the effects of growth hormones like auxins, gibberellins, cytokinins, on growth and development of plants.

03 Feb 2026
Answer :
Word Count : 507
Auxins, gibberellins, and cytokinins are key plant hormones that play crucial roles in regulating various aspects of plant growth and development. Each hormone has distinct functions, yet they often interact to modulate physiological processes, ensuring proper plant growth. Auxins are primarily involved in cell elongation and are crucial for the regulation of growth in response to environmental stimuli such as light and gravity. One of the primary auxins in plants is indole-3-acetic acid (IAA). It promotes the elongation of cells in plant stems, particularly in the elongation zone. Auxins also play a role in apical dominance, where the main shoot suppresses the growth of lateral buds, ensuring that the plant grows upwards toward the light. In root development, auxins promote the formation of lateral roots and influence the differentiation of root cells. Furthermore, auxins are involved in tropic responses such as phototropism (growth toward light) and gravitropism (growth in response to gravity), ensuring the plant’s survival in its environment. Gibberellins (GAs) are a group of plant hormones that promote growth by stimulating cell elongation, division, and differentiation. They are particularly influential in seed germination, where they break seed dormancy by promoting the synthesis
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