Indooläädikhape

Indooläädikhape, also known as indole-3-acetic acid or IAA, is a naturally occurring plant hormone belonging to the auxin class. It is one of the most important and abundant plant hormones, playing a critical role in various aspects of plant growth and development. IAA is primarily synthesized in the young leaves and developing fruits of plants, and it is then transported to other parts of the plant where it exerts its effects.

The primary functions of indooläädikhape include the promotion of cell elongation and division, which are fundamental to plant growth. It is essential for the development of roots, stems, and leaves, and it influences the formation of flowers and fruits. IAA also plays a key role in tropisms, such as phototropism (the bending of plants towards light) and gravitropism (the growth of plants in response to gravity). Furthermore, it is involved in apical dominance, the phenomenon where the central stem grows more strongly than the lateral stems.

Indooläädikhape acts by binding to specific receptor proteins within plant cells, initiating a cascade of molecular events that lead to changes in gene expression and cellular processes. Its concentration within plant tissues is tightly regulated, ensuring that growth responses are appropriate to environmental conditions. While naturally produced, synthetic auxins, which mimic the action of IAA, are widely used in agriculture and horticulture for various purposes, including rooting cuttings and preventing fruit drop.