Effects of Plant Growth Regulators on Grain-filling and Yield of Rice |
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Authors: | RAY S; CHOUDHURI M A |
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Institution: | Department of Botany, Burdwan University Burdwan, India |
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Abstract: | Effects of three phytohormones (IAA1, GA3 and kinetin) on grain-fillingand the pattern of 32P translocation from individual leavesto grains were studied at intervals of 7 days during the progressof reproductive development of rice (Oryza saliva L. cv. Jaya).The plants were sprayed with 100 µg ml1 aqueoussolutions of the hormones at 100 days, when the plants wereentering the reproductive stage. Kinetin produced a pronouncedeffect on grain-filling as well as on 32P mobilization fromindividual leaf to grains and increased yield, possibly by increasingleaf longevity. GA3 and IAA also increased the grain-fillingand 32P mobilization significantly over control but the effectswere less marked than those of kinetin. Oryza sativa L., rice, grain yield, translocation, growth regulators, gibberellic acid, indol-3-yl acetic acid, kinetin |
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