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

Scott, G.; Rupar, M.; Fletcher, A.G.D.; Dickinson, M.; Shama, G.

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.

Citation

Scott, G., Rupar, M., Fletcher, A., Dickinson, M., & Shama, G. (2017). 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, 52-58. https://doi.org/10.1016/j.postharvbio.2016.10.012

• Journal Article Type: Article
• Acceptance Date: Oct 21, 2016
• Online Publication Date: Nov 5, 2016
• Publication Date: 2017-03
• Deposit Date: Nov 1, 2016
• Publicly Available Date: Nov 5, 2016
• Journal: Postharvest Biology and Technology
• Print ISSN: 0925-5214
• Electronic ISSN: 0925-5214
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 125
• Pages: 52-58
• DOI: https://doi.org/10.1016/j.postharvbio.2016.10.012
• Keywords: UV-C hormesis; Solanum lycopersicum; Intense Pulsed light; Induced resistance; Delayed 25 ripening; Polychromatic light
• Public URL: https://nottingham-repository.worktribe.com/output/829876
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0925521416304975
• Additional Information: This article is maintained by: Elsevier; Article Title: A comparison of low intensity UV-C and high intensity pulsed polychromatic sources as elicitors of hormesis in tomato fruit; Journal Title: Postharvest Biology and Technology; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.postharvbio.2016.10.012; Content Type: article; Copyright: © 2016 Elsevier B.V. All rights reserved.