09 Dec Role of Plant Growth Regulators in Improvement of Fruit Crops
फलों की फसल के सुधार में पादप विकास नियामकों की भूमिका Plant growth regulators refer to an organic compound other than nutrients and vitamins which are active at low concentrations in promoting, inhibiting or modifying growth and development. The naturally occurring (endogenous) growth substances are commonly known as plant hormones, while the synthetic ones are called growth regulator. Plant hormone is synthesised in one part of the plant and translocated to another part, where in very low concentrations it causes a physiological response. The plant hormones are identified as promoters (auxins, gibberellin and cytokinin), inhibitors (abscissic acid and ethylene) and other hypothetical growth substance (florigen, flowering hormone, etc). Application of plant growth regulators results in better output as it improves the internal physiology of developing fruits to improve fruit set, reduce fruit drop and to amend various physiological disorders in order to improve quality and yield. Ethylene is known as the ‘ripening’ hormone. Manipulations of fruits and vegetables are done by either exogenous ethylene or inhibitors of ethylene production. However, other plant growth regulators are also used in horticultural production and have ramifications for postharvest quality. Many of the commercially available plant growth regulators are used in stone fruit production. Auxins are used to enhance the size of stone fruits. Gibberellins are used for increasing fruit...