title: Abscisic acid and pyrabactin improve vitamin C contents in raspberries.
abstract: Abscisic acid (ABA) is a plant growth regulator with roles in senescence, fruit ripening and environmental stress responses. ABA and pyrabactin (a non-photosensitive ABA agonist) effects on red raspberry (Rubus idaeus L.) fruit development (including ripening) were studied, with a focus on vitamin and antioxidant composition. Application of ABA and/or pyrabactin just after fruit set did not affect the temporal pattern of fruit development and ripening; neither provitamin A (carotenoids) nor vitamin E contents were modified. In contrast, ABA and pyrabactin altered the vitamin C redox state at early stages of fruit development and more than doubled vitamin C contents at the end of fruit ripening. These were partially explained by changes in ascorbate oxidation and recycling. Therefore, ABA and pyrabactin applications may be used to increase vitamin C content of ripe fruits, increasing fruit quality and value. However, treatments containing pyrabactin-combined with ABA or alone-diminished protein content, thus partially limiting its potential applicability.
authors.affiliation: Departament de Biologia Vegetal, Universitat de Barcelona, Facultat de Biologia, Avinguda Diagonal 643, 08028 Barcelona, Spain.
authors.forename: Javier A
authors.initials: JA
authors.lastname: Miret
authors.affiliation: Departament de Biologia Vegetal, Universitat de Barcelona, Facultat de Biologia, Avinguda Diagonal 643, 08028 Barcelona, Spain. Electronic address: smunne@ub.edu.
authors.forename: Sergi
authors.initials: S
authors.lastname: Munné-Bosch
mesh_terms: D000040:Abscisic Acid / Q000737:chemistry*; D000975:Antioxidants / Q000032:analysis*; D001205:Ascorbic Acid / Q000032:analysis*; D002338:Carotenoids / Q000032:analysis; D005638:Fruit / Q000737:chemistry / Q000254:growth & development; D009281:Naphthalenes / Q000737:chemistry*; D010937:Plant Growth Regulators / Q000737:chemistry*; D065856:Rubus / Q000737:chemistry* / Q000254:growth & development; D013449:Sulfonamides / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D009281:Naphthalenes; D010937:Plant Growth Regulators; D013449:Sulfonamides; C540973:pyrabactin; D002338:Carotenoids; D000040:Abscisic Acid; D001205:Ascorbic Acid
keywords: Abscisic acid; Abscisic acid (PubChem CID: 5280896); Antioxidants; Ascorbic acid (PubChem CID: 54670067); Dehydroascorbate; Dehydroascorbic acid (PubChem CID: 440667); Enzymatic activity; Fruit ripening; Hydrogen peroxide (PubChem CID: 784); Pyrabactin (PubChem CID: 1125790); Rubus idaeus; Tocopherol; alpha-Tocopherol (PubChem CID: 14985); delta-Tocopherol (PubChem CID: 92094)