A comparison of low intensity UV-C and high intensity pulsed polychromatic sources as elicitors of hormesis in tomato fruit

Scott, G. and Rupar, M. and Fletcher, A.G.D. and Dickinson, Matthew and Shama, G. (2016) A comparison of low intensity UV-C and high intensity pulsed polychromatic sources as elicitors of hormesis in tomato fruit. Postharvest Biology and Technology, 125 . pp. 52-58. ISSN 0925-5214

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Abstract

Post-harvest hormetic treatment of mature green tomato fruit (Solanum lycopersicum cv. Mecano) with high intensity pulsed polychromatic light (HIPPL) significantly delayed ripening to levels comparable to those achieved using a conventional low intensity UV-C (LIUV) source. A 16 pulse HIPPL treatment reduced the ΔTCI (tomato colour index) by 50.1 % whilst treatment with a LIUV source led to a reduction of 43.1 %. Moreover, the 16 pulse treatment also induced disease resistance in the fruit to Botrytis cinerea with a 41.7 % reduction in disease progression compared to a 38.1 % reduction for the LIUV source. A single 16 pulse HIPPL treatment was found to significantly reduce disease progression on both mature green and ripe fruit with a 28.5 % reduction on ripe fruit in comparison to 13.4 % for the LIUV treatment. It is shown here that delayed ripening and disease resistance are local responses in side treated tomato fruit for both LIUV and HIPPL treatments. Finally, utilising a 16 pulse HIPPL treatment would reduce treatment times from 370 s for LIUV sources to 10 s per fruit - a 97.3 % reduction.

Item Type: Article
Keywords: UV-C hormesis; Solanum lycopersicum; Intense Pulsed light; Induced resistance; Delayed 25 ripening; Polychromatic light
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Biosciences
Identification Number: 10.1016/j.postharvbio.2016.10.012
Depositing User: Eprints, Support
Date Deposited: 01 Nov 2016 09:52
Last Modified: 18 Oct 2017 18:58
URI: http://eprints.nottingham.ac.uk/id/eprint/38388

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