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Hormone directed sucrose transport during fruit set induced by gibberellins in Pisum sativum
Author(s) -
Peretó Juli G.,
Beltrán José P.
Publication year - 1987
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1987.tb04300.x
Subject(s) - gibberellin , pisum , sucrose , gibberellic acid , sativum , parthenocarpy , biology , botany , horticulture , chemistry , biochemistry , germination
A new system has been developed to study hormone‐directed transport in intact plants during parthenocarpic fruit set induced by gibberellins. Gibberellic acid (GA 3 ) and gibberellin A 1 (GA 1 ) applied to unpollinated ovaries of pea ( Pisum sativum L. cv. Alaska) promoted sucrose transport from the leaf to the site of hormone application. In vivo experiments showed an early (30 min) accumulation of [ 14 C]‐sucrose in ovaries of pea stimulated by gibberellins. This activation of sucrose transport appears to be mediated by gibberellins (GA 1 , GA 3 ), increasing both loading of phloem with sucrose in the leaf (source) and sucrose unloading in the ovary (sink). The ability of pea tissue segments to take up sucrose in vitro was not affected by the hormonal treatment.