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Flesh temperature during impact injury and subsequent storage conditions affect the severity of colour change caused by red drupelet reversion in blackberries

Citation

Edgley, M and Close, DC and Measham, PF, Flesh temperature during impact injury and subsequent storage conditions affect the severity of colour change caused by red drupelet reversion in blackberries, Proceedings of the 30th International Horticultural Congress IHC2018: 3rd International Berry Fruit Symposium, 12-16 August 2018, Istanbul, Turkey, pp. 129-134. ISSN 0567-7572 (2019) [Refereed Conference Paper]


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Copyright Statement

Copyright 2019 ISHS

DOI: doi:10.17660/ActaHortic.2019.1265.18

Abstract

Red drupelet reversion (RDR) is a physiological occurrence in blackberries where drupelets revert from black at harvest to red postharvest. The objectives of this trial were to assess the effects of temperature during mechanical injury and temperature changes following injury of blackberries on the subsequent development of RDR. Individual fruit were subjected to mechanical injury from a steel ball dropped from a height of 25 cm at initial temperatures of 15, 25, and 35C. Following injury, fruit were cooled to 2C rapidly in a -24C cooler or slowly in a 2C cooler. Colour of the impact site and of undamaged control fruit were measured 24 h and 7 days after the initial impact injury using a colourimeter. Impact injury caused a significant colour difference (∆E) compared to control in 95% of fruit. There were significant interactions between initial temperatures and cooling rates on the colour of the impact site 24 h and 7 days after treatment. Higher fruit temperatures at the time of mechanical injury and a faster cooling rate post-injury were associated with increased lightness and chroma. The results confirm that mechanical injury to blackberry fruit leads to RDR, and that temperature of fruit at the time of injury and subsequently can influence the severity of RDR.

Item Details

Item Type:Refereed Conference Paper
Keywords:bruising, impact injury, reversion, CIELAB, storage
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Horticultural production
Research Field:Post harvest horticultural technologies (incl. transportation and storage)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Berry fruit (excl. kiwifruit)
UTAS Author:Edgley, M (Mr Max Edgley)
UTAS Author:Close, DC (Professor Dugald Close)
UTAS Author:Measham, PF (Dr Penny Measham)
ID Code:139549
Year Published:2019
Deposited By:TIA - Research Institute
Deposited On:2020-06-22
Last Modified:2020-07-16
Downloads:0

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