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 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.