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Development of a method for profiling of volatile organic compounds to monitor heat stress in hot water dipped apples

Himmelboe, Martin (2016) Development of a method for profiling of volatile organic compounds to monitor heat stress in hot water dipped apples. In: Acta Horticulturae, 1144, pp. 341-348.

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Summary

Storage rot is a major contributor to losses of organic apples due to restrictions in spraying in orchards. Postharvest pre-treatments such as hot water dipping (HWD) have been proven successful to reduce storage rot. However, excessive heat during dipping easily induces heat stress and physiological disorders, which only show up after several weeks of cold storage. To develop further the HWD technology, a method for early detection of physiological disorders is desirable. As apples emit volatile organic compounds (VOCs) in response to stress and ripening, VOC profiling can be a useful tool for detecting the immediate heat stress and latent physiological disorders.
In this study, a selected ion-monitoring program was developed for analyzing VOCs from apples (Malus domestica ‘Ingrid Marie’ and ‘Pinova’) dipped in water at 20 and 56°C for 3 min. VOCs were sampled by solid-phase microextraction and analyzed by GC-MS in total ion current mode. From these results, a selected ion-monitoring program was developed which enabled detection of trace VOCs collected by static headspace sampling. The results showed that all apples dipped in 56°C for 3 min developed visual signs of physiological disorders in cold storage. At the same time, the VOC profile of these apples differed from that of the 20°C treated apples. This work provides a solid basis for a future development of the VOC method to forecast physiological disorders and to improve the HWD technology for better control of storage rot.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Subjects: Crop husbandry > Production systems
Crop husbandry > Production systems > Fruit and berries
Crop husbandry > Crop health, quality, protection
Crop husbandry > Post harvest management and techniques
Research affiliation: Denmark > AU - Aarhus University
Denmark > Organic RDD 2
Denmark > Organic RDD 2 > ProtecFruit
ISSN:0567-7572
Deposited By: Broedsgaard Henriksen, Academic employee Merete
ID Code:31060
Deposited On:10 Jan 2017 09:10
Last Modified:10 Jan 2017 09:10
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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