Journal
POSTHARVEST BIOLOGY AND TECHNOLOGY
Volume 172, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.postharvbio.2020.111381
Keywords
Mango; High hydrostatic pressure; Physicochemical property; Carotenoids; Carotenogenic genes
Categories
Funding
- Hubei Provincial Department of Education (Processing and Comprehensive Utilization of Agricultural Products) [2016-620-000-001-044]
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Mild high hydrostatic pressure treatment improved the binding capacity of cell wall macromolecules in mango, preventing structural damage and reducing respiration rate and consumption of sugars and acids. It also increased carotenoid biosynthesis and enhanced the content of bioactive substances in postharvest fruit.
This study evaluated the effect of mild high hydrostatic pressure (HHP, 20-80 MPa/10 min) on the quality of the whole fresh mango during postharvest storage. HHP promoted the capacity of cell wall macromolecules binding water and prevented structural damage of mango tissues during postharvest storage. It reduced the respiration rate and the consumption of sugars and acids, and in most cases increased bioactive substances (vitamin C, total phenolics, flavonoids and carotenoids) and antioxidant activities. Moreover, HHP significantly increased carotenoid biosynthesis at the transcriptional level. The expressions of carotenogenic genes including geranylgeranyl diphosphate synthase (4.7 fold), phytoene synthase (4.66 fold), phytoene desaturase (3.53 fold), zeta-carotene desaturase (2.79 fold) and beta-Ring hydroxylase (2.17 fold) were increased after HHP treatment, while zeaxanthin epoxidase (0.78 fold) transcripts were reduced. As a result, there was the increase of carotenes (1.56-2.00 fold), beta-cryptoxanthin (1.38-2.73 fold) and zeaxanthin (1.42-1.67 fold) and the reduction of antheraxanthin (0.64-0.85 fold) and violaxanthin (0.88-0.90 fold) in HHP-treated samples. HHP is likely a potential technology for modulating physiology and nutritional components (especially carotenoids) of the postharvest fruit.
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