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Effect of Prestorage Hot Water Treatments on Chilling Injury in ‘Hongyang’ Kiwifruit

MA Qiu-shi, RAO Jing-ping*, LI Xiu-fang, SUN Zhen-ying, SUO Jiang-tao   

  1. College of Horticulture, Northwest A & F University, Yangling 712100, China
  • Online:2014-07-25 Published:2014-08-26
  • Contact: RAO Jing-ping

Abstract:

The effects of three different prestorage hot water treatments [(35±1), (45±1) and (55±1) ℃] on chilling
injury in ‘Hongyang’ kiwifruits were investigated. The results showed that both (35±1) and (45±1) ℃ treatments could
significantly reduce chilling injury index and chilling injury incidence, inhibit the accumulation of malonaldehyde and the
increase in membrane permeability and decrease respiratory rate and ethylene production rate. Moreover, these two
treatments maintained higher peroxidase (POD) activity and lower polyphenol oxidase (PPO) activity. These kiwifruits
retained better commercial quality at the end of storage. However, (55±1) ℃ treatment aggravated chilling injury
in ‘Hongyang’ kiwifruits and resulted in the opposite physiological effects in comparison with two other treatments.
This study suggests that dipping in (45±1) ℃ hot water for 10 min is the most effective against chilling injury in
‘Hongyang’ kiwifruits.

Key words: postharvest, kiwifruit, fruit, hot water treatment, chilling injury

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