New Generation PGRs Used in Fruit Production

Abstract

Plant hormones are small molecules derived from various metabolic pathways, which are present at a very low concentration and act either locally, at or near the site of synthesis, or in distant tissues. Plant hormone includes the new generation PGRs like brassinoids, jasmonic acid, salicylic acid, polyamines, triacontanol, 1-MCP and prohexadione – Ca. Scientist often refers to five classical plant hormones; which were identified in the early to mid 20th century. The activities of new class PGRs depend on their concentration and environmental factors affecting their absorption and plant’s physiological state. PGRs have the ability to effect to effect cell division, cell structure, cell expansion, cell function and mediate environmental stress even at low concentrations. Direct application of roots, leaf, flowers, buds and shoots has been shown to enhance resistance to biotic and abiotic stress. Products of PGRs are generally employed throughout viticulture, floriculture, agriculture and horticulture to increase crop yield in sub-optimal soil and harsh environmental conditions. New class of plant hormones which play important roles in various physiological processes including seed development and germination, flower sex expression, fruit development, improvement of quality and quality of produce and resistance to various biotic and abiotic stresses.