4.7 Article

Effects of inside-out heat-shock via microwave on the fruit softening and quality of persimmon during postharvest storage

期刊

FOOD CHEMISTRY
卷 349, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.129161

关键词

Persimmon; Microwave treatment; Fruit softening; Postharvest quality

资金

  1. Key Research and Development Program of Zhejiang Province, China [2018C02049]
  2. National Natural Science Foundation of China [31772366]
  3. Technology Innovation Program of Zhejiang Province, China [ZJWR0102001]

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The study revealed that microwave treatments can effectively delay the softening of persimmon fruit and improve fruit quality, making it a suitable method for fruit preservation.
Rapid postharvest softening largely limits the shelf-life of persimmon (Diospyros kaki L.) fruit. Microwave is a new environmental-friendly inside-out heat-shock approach, whose effect on the fruit softening and quality has not yet been investigated. The current study applied two kinds of microwave treatments (low-power long-time, LPLT, or high-power short-time, HPST) to persimmon fruit with comparison to the hot water (HW) treatments. The results showed both microwave treatments maintained firmness, facilitated the deastringency, and increased soluble solid contents (SSC) and sugar-acid ratio of persimmon fruit. The microwave treatments reduced the cellulose and pectin degradation, and inhibited the cellulase activity, resulting in a significantly higher firmness than HW treatment and control after 2 and 4 days of storage. Moreover, application of HPST treatment down regulated gene expression of DkPG1, DkPE2 and DkEGase1 compared with untreated fruits. These results indicated that microwave treatment is a promising soft-delaying method for the preservation of persimmon fruit.

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