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Root growth. Prevention or promotion of stem elongation. Hormones are produced naturally by plants, while plant growth regulators are applied to plants by humans. Plant hormones and growth regulators are chemicals that affect: Flowering. Plant growth regulators play an important role in flower production, which in small amount promotes or inhibits or quantitatively modifies growth and development. Abscissic Acid: Abscissic acid regulates abscission and dormancy. Aging. Kandhari in Allahabad Agro-Climatic Conditions” at Horticulture Research Farm, University of Agriculture, Technology and Sciences, Allahabad (U.P) during the year 2016-2017. As we water, fertilize, compost and watch, we can only hope that the plant grows according to our needs, at least in some way. Distortion and killing of organs. Plant growth is an entirely natural process, one that is seemingly out of our hands. Keywords Plant growth regulators, Growth, Fruit, Yield Accepted: ... on effect of growth substances on flowering and fruiting characters of ‘Sardar’ guava. Gibberellic acid increased to be very effective in manipulating growth and flowering in chrysanthemum (Gautam et al., 2006). GAs have been shown to induce flowering in most conifers, but GA application on an operational basis has been worked out for only a few species. None of the plant growth regulators affected time to anthesis. In vitro flowering acts as an essential tool in examining flower induction, initiation, and the floral developmental process through plant growth regulators, such as cytokinins, gibberellins, and auxins (Ziv and Noar, 2006). It acts as general plant growth inhibitor and also inhibits plant metabolism. A growth regulator is •An organic compound, •Can be natural or synthetic, •It modifies or controls one or more specific physiological processes within a plant but the sites of action and production are different. 2 growertalks | 2013 Plant Growth Regulator Guide The number of options available for controlling plant growth has greatly expanded over the past few years (Table 1). Color enhancement of fruit. It promotes female flowers in cucumbers, and therefore, increases the yield. However, like other PGRs it also has wide range of effects on plant growth and development. The flowers have been exploited to cool burning skin or cool fever (Taha et al., 2009). Use of Plant Growth Regulators for Improving Fruit ... we focus on the role of plant growth regulators in subtropical fruit production. A field experiment was conducted to investigate the “Effect of Plant Growth Regulators on Growth and Flowering of Pomegranate (Punica granatum L.) cv. Cultural techniques have been used to some extent in the past for these purposes, but the use of plant-growth regulators (PGRs), particularly the gibberellins (GAs), has been increasingly successful. If the compound is produced within the plant, it is called as plant hormone. It may guide the growth or differentiation of cells, organs, or tissues. Plant Growth Regulators: Type # 5. Each label has specific recommended dose ranges, recommendations and precautions (Table 2). Prevention of leafing, leaf fall or both. Plant growth regulator, is a kind of (class) chemical synthesis of substances, the regulation of the role of plants, it can change the flowering plant growth and flowering process. PBRs such as NAA, GA 3 Daminozide was ineffective at controlling plant height, and plant diameter increased with 2500, 2500-applied twice, and 5000 mg.L⁻¹. 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