Author: Nunes, M Cecilia do Nascimento

Source: Stewart Postharvest Review, Volume 4, Number 4, August 2008 , pp. 1-14(14)

Publisher: Stewart Postharvest Solutions

Abstract:

Purpose of review: This review demonstrates through data published in some of the most recent scientific publications how environmental conditions, namely temperature, humidity and atmosphere can significantly impact the quality of fresh fruits and vegetables.

Findings: Although several studies have shown that ambient temperature and atmosphere modifications significantly affect the quality of horticultural commodities, not many have considered the impact of humidity alone on the quality of fresh fruits and vegetables. Because ambient humidity is probably one of the most difficult environmental conditions to control, the majority of studies have used protective packaging to maintain acceptable humidity levels around the produce and at the same time create a modification of the atmosphere, which together help to maintain quality and extend shelf-life. A vast number of studies carried on controlled atmosphere (CA) storage and modified atmosphere packaging (MAP) have shown that these technologies in combination with proper temperature management extend shelf-life and maintain the quality of fruits and vegetables. However, optimum atmosphere conditions cannot be generalised as they are greatly dependent on numerous factors related to the produce, packaging materials and environment.

Directions for future research: Temperature variations often encountered during distribution and retailing constitute one of the major concerns when establishing optimum CA or MAP conditions. In order to maintain quality and reduce waste, ready applicable research should focus on the impact of real life conditions on the quality of fresh fruits and vegetables and on ways to solve major breaks in the cold chain. Furthermore, while ambient humidity might not constitute a concern when produce is packed, when unpacked, the low humidity levels often encountered during distribution and retailing may lead to important quality and economic losses. Therefore, future research should also focus on the effects of different levels of ambient relative humidity alone and in combination with temperature on the quality of fresh produce. Finally, consideration should be given to the development or improvement of "intelligent" and biodegradable films that can create an optimum atmosphere and maintain humidity levels within requirements for each specific produce and at the same time be attractive to the consumer.

Keywords: TEMPERATURE; HUMIDITY; ATMOSPHERE; APPEARANCE; TEXTURE; COMPOSITION

Document Type: Research article

DOI: http://dx.doi.org/10.2212/spr.2008.4.4

Publication date: 2008-08-01

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