Abscisic acid and pyrabactin improve vitamin C contents in raspberries

Food Chem. 2016 Jul 15;203:216-223. doi: 10.1016/j.foodchem.2016.02.046. Epub 2016 Feb 6.


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.

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).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Abscisic Acid / chemistry*
  • Antioxidants / analysis*
  • Ascorbic Acid / analysis*
  • Carotenoids / analysis
  • Fruit / chemistry
  • Fruit / growth & development
  • Naphthalenes / chemistry*
  • Plant Growth Regulators / chemistry*
  • Rubus / chemistry*
  • Rubus / growth & development
  • Sulfonamides / chemistry*


  • Antioxidants
  • Naphthalenes
  • Plant Growth Regulators
  • Sulfonamides
  • pyrabactin
  • Carotenoids
  • Abscisic Acid
  • Ascorbic Acid