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An Overview of Plant Hormones (Phytohormones)

Plant hormones or Phytohormones may be defined as an "an organic substance produced naturally in plants which control growth and other physiological functions at a site away from its place of synthesis". Thimann (1948) proposed the term phyohormones. As these hormones are synthesis by plants, they are also called phyohormones.
       These are certain synthetic chemicals which are similar to phytohormones in structure and function. All  these substances both synthetic and natural phytohormones which regulate the physiological activity of plants are called plant growth regulators.The different growth regulators are Auxins, Gibberllins, Cytokinins, Ethylene and Abscisic acid.

I.Growth Promoting Hormones:
II. Growth Inhibiting Hormones: 
III. Other Growth Regulators
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