e.g. Plant Growth Regulators. New York State regulates PGRs as pesticides, as many herbicides are classified as growth regulators and therefore, they are registered with the EPA. Plant Growth Regulators are defined as small, simple chemicals produced naturally by plants to regulate their growth and development. Plant growth regulators 1. The first phytohormone to be discovered is the Auxin and it was discovered by the biologist Charles Darwin. Growth regulator Example 1 Auxins IAA, IBA, NAA, 2,4-D 2 Gibberellins Gibberellic acid 3 Cytokinins Kinetin, Zeatin 4 Ethylene Ethylene 5 Dormins Abscissic Acid 6 Flowering hormones Florigen , Anthesin , Vernalin 7 Miscellaneous natural sunstances Cyclitols , Vitamins , Phytochrome , Traumatic substances etc. What are plant growth regulators? Cell division Cell enlargement.

Plant growth regulators (also called plant hormones) are numerous chemical substances that profoundly influence the growth and differentiation of plant cells, … Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Simply put, plant growth regulators (also known as growth regulators or plant hormones) are chemicals used to alter the growth of a plant or plant part. GROWTH Growth Irreversible change in Mass, i.e. It means quantitative increase in plant body. increase in size, volume and weight of any part of plant’s body. Plant hormones (also known as phytohormones) are signal molecules, produced within plants, that occur in extremely low concentrations.Plant hormones control all aspects of plant growth and development, from embryogenesis, the regulation of organ size, pathogen defense, stress tolerance and through to reproductive development. Characteristics.

Plant Growth Regulators can be of a diverse chemical composition such as gases (ethylene), terpenes (gibberellic acid) or carotenoid derivates (abscisic acid). PowerPoint Presentation: Sr. No. Plant growth regulators (PGRs) are organic compounds, other than nutrients, that modify plant physiological processes. Plant growth regulators (PGR) are organic compounds, either synthesized in the plant or as an applied substance, that in very low concentrations can either increase or decrease plant growth. Plant Growth Regulators 2. Plant growth hormones or regulators are of the following types: Plant Growth Promoters; Plant Growth Inhibitors; Plant Growth Promoters Auxins.