Question

Short / Long answer type questions.
Name three types of hormones that promote growth processes, and give several specific functions for each.

Answer 1

Plant hormones (also known as phytohormones) are signal molecules produced within plants, that occur in extremely low concentrations. Plant hormones control all aspects of growth and development, from embryogenesis, the regulation of organ size, pathogen defense, stress tolerance and through to reproductive development. There are different classes of hormone which help in plant growth is:
• Abscisic acid (also called ABA) is one of the most important plant's growth regulators. In general, it acts as an inhibitory chemical compound that affects bud growth, and seed and bud dormancy.
• Auxins are compounds that positively influence cell enlargement, bud formation, and root initiation.
• Brassinosteroids are a class of polyhydroxy steroids, the only example of steroid-based hormones in plants. Brassinosteroids control cell elongation and division, gravitropism, resistance to stress, and xylem differentiation.