Fruit-set of unpollinated ovaries of Pisum sativum L. |
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Authors: | José L. García-Martínez Juan Carbonell |
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Affiliation: | (1) C.S.I.C., Instituto de Agroquímica y Tecnología de Alimentos, Jaime Roig 11, Valencia-10, Spain;(2) Present address: Plant Growth Laboratory, University of California, Wickson Hall, 95616 Davis, CA, USA |
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Abstract: | The influence of removing the apical shoot and different leaves above and below the flower on the fruit-set of unpollinated pea ovaries (Pisum sativum L. cv. Alaska) has been studied. Unpollinated ovaries were induced to set and develop either by topping or by removing certain developing leaves of the shoot. Topping had a maximum effect when carried out before or on the day of anthesis, and up to four consecutive ovaries were induced to set in the same plant. The inhibition of fruit-set was due to the developing leaves and not to the apex. The third leaf above the first flower, which had a simultaneous development to the ovary, had the stronger inhibitory effect on parthenocarpic fruit-set. The application of different plant-growth regulators (indoleacetic acid, naphthylacetic acid, 2,4-dichlorophenoxyacetic acid, gibberellic acid, benzyladenine and abscisic acid) did not mimic the negative effect of the shoot.Abbreviations CCC (2-chloroethyl)trimethylammonium chloride - MH maleic hydrazide - IAA indole-3-acetic acid - NAA 1-naphthaleneacetic acid - 2,4-D 2,4-dichlorophenoxyacetic acid - GA3 gibberellic acid - 6-BAP benzyladenine - ABA abscisic acid |
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Keywords: | Abscisic acid Auxin Cytokinin Decapitation Fruit-set Gibberellin Parthenocarpy Pisum |
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