Effect of γ-aminobutyric acid on the antioxidant system and biochemical changes of mango fruit during storage
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Postharvest management of mango, as a climacteric fruit with high perishability rate, is of particular economic importance. In this study, the effect of γ-aminobutyric acid (GABA) (50, 100 and 200 µmol L−1) were evaluated regarding efficacy of delaying in fruit softening and maintaining nutritional quality of mango fruit during storage at 15 ± 1 °C and 85% RH. According to the results, the total soluble solids content and titratable acidity were not influenced by the γ-aminobutyric acid significantly; while, at 200 µmol L−1 it has maintained firmness, ascorbic acid, phenols and flavonoids content of mango significantly. Also, the higher antioxidant capacity was found in treated fruits. The treated fruits had more activity of the catalase and peroxidase enzymes than the control. The γ-aminobutyric acid significantly controls the activity of polyphenol oxidase enzyme during storage. The GABA treated fruits showed the higher a* value and lower b* and L* during the storage. These findings suggested that γ-aminobutyric acid treatment could be useful at a proper concentration in order to improve postharvest quality of mango.
KeywordsMango γ-Aminobutyric acid Postharvest Antioxidant enzyme
This study as research project (Code Number: 96/200/141) was financially supported by university of Hormozgan, Bandar Abbas, Iran. Authors are thankful to Dr Hossein Zeinalipour, Research and Technology deputy, for providing necessary facilities for carrying out this work.
Compliance with ethical standards
Conflict of interests
The authors declare that there is no conflict of interests regarding the publication of this paper.
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