International Journal of Plant & Soil Science

For plants to thrive, phytohormones play a key role in their development and growth. A total of five different phytohormones have been identified here: auxin, gibberellins, cytokinin, ethylene and abscisic acid. The growth-promoting and dormancy-breaking effects of gibberellin make it a crucial phytohormone. Japan was the site of its discovery around the end of the nineteenth century. The most often utilized type of gibberellic acid is GA3, which is a metabolite. Tobacco and lettuce, require bright light to germinate, and may be grown with the aid of gibberellic acid even in the dark. Internode elongation, like in the case of pea or maize suffering from dwarfism, is another benefit of GA. It aids in the development of seedless tomato and grape types. During germination, gibberellins in the aleurone layer of the endosperm of cereal grains release particular enzymes like amylase, which hydrolyzes starch to form simple sugars. These sugars are then transferred to the developing embryo to be used as a source of energy. Gibberellin plays a crucial role in fruit setting, and it also aids fruit development and increases fruit size, making it one of the most significant growth regulators.