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Effect of Polyvinyl Pyrrolidone on the Quality and Browning of ‘Okubo’ Peach Fruits during Storage

YANG Qingzhen, WANG Feng   

  1. 1. Department of Life Sciences, Yuncheng University, Yuncheng 044000, China;
    2. Department of Science and Technology, Yuncheng University, Yuncheng 044000, China
  • Online:2016-07-25 Published:2016-07-26
  • Contact: WANG Feng

Abstract:

The effects of postharvest dipping with different concentrations of polyvinyl pyrrolidone (PVP) on the quality and
browning of peach (Prunus persica L. Batsch ‘Okubo’) during cold storage were investigated. The results showed that PVP
treatment at various concentrations significantly slowed down fruit softening, retarded the increase in juice extraction rate
and reducing sugar content, and maintained higher levels of titratable acids and VC. Moreover, PVP treatment decreased the
browning index, and the best effect was observed at 3 mg/mL. PVP treatment inhibited the increase in malonaldehyde (MDA)
content and membrane permeability, and also suppressed the activities of peroxidase (POD), polyphenol oxidase (PPO) and
phenylalanine ammonia lyase (PAL). These results indicated that PVP could reduce browning and maintain eating quality of
cold-stored peach fruits, thus having potential application in the postharvest industry.

Key words: peach, polyvinyl pyrrolidone, storage, quality, browning

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