NEET BIOLOGY

Detailed explanation-1: -A plant hormone is commonly defined as an organic substance that is produced in one part of a plant and translocated to another part where, at very low concentrations, it stimulates a physiological response.

Detailed explanation-2: -IAA (Indole-3-acetic acid) is the most abundant auxin in plants. It is synthesised in shoot and root tips and are translocated to other parts for growth of the plant.

Detailed explanation-3: -Plant hormones are produced by individual cells: in regions where they are required by the plants. For example; auxin is synthesized in the cells of growing shoot apices. Plant hormones are translocated through the vascular system of plants.

Detailed explanation-4: -Plant hormones are regulators of almost all aspects of plant development and plant responses to their environment. Active at very low concentrations, with tight spatial regulation of synthesis and response, many plant hormones have key roles in the interactions between plants and beneficial microbes.

Detailed explanation-5: -Hormones in plants are synthesised in almost every part such as roots, shoots, leaves, fruits and seeds.