What is the main function of IAA?
IAA is the main auxin in plants, regulating growth and developmental processes such as cell division and elongation, tissue differentiation, apical dominance, and responses to light, gravity, and pathogens. Roots are most sensitive to fluctuations in IAA level. Auxin (IAA) is transported down to the root tip from the shoot in the vascular cylinder. Here it is redistributed to the root cortex and epidermis, and transported back up the root to the elongation zone, where it regulates the rate of cell elongation.Indoleacetic acid (IAA) is an important type of auxin, that inhibits growth in the roots and promotes growth in the shoots. It is transported over long distances through the phloem, and short distances by diffusion and active transport.Complete answer: IAA- Indole acetic acid: It is one of the most commonly found hormones in the plants in the auxin class. It is the derivative of the indole with a carboxymethyl substituent. It is soluble in ethanol. It appears to be white. It has the major function of elongation of the plants and their development.IAA or indole-3-acetic acid is a plant growth regulator or hormone. It is a type of auxin. It is a naturally occurring plant hormone. It imparts various physiological effects and regulates plant growth and development.Indole-3-Acetic Acid (IAA) is poorly soluble in H2O or aqueous buffers, unless the pH of the solvent is alkaline. N NaOH is the preferable solvent to dissolve IAA. The use of this solvent minimizes the addition of organic solvents into the final experiment protocol.