Pulsed UV Hormesis MS.pdf (429 kB)
0/0

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

Download (429 kB)
journal contribution
posted on 04.11.2016 by George Scott, M. Rupar, A.G.D. Fletcher, M. Dickinson, Gilbert Shama
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.

Funding

The study was financed by the Agriculture and Horticulture Development Board’s Horticulture Department (AHDB Horticulture) Project Code- PE 023 and Loughborough University. Tomato fruit were provided by APS Salads (UK) to whom thanks are extended.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Postharvest Biology and Technology

Citation

SCOTT, G. ... et al, 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, pp. 52-58.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

21/10/2016

Publication date

2017

Notes

This paper was published in the journal Postharvest Biology and Technology and the definitive published version is available at http://dx.doi.org/10.1016/j.postharvbio.2016.10.012.

ISSN

0925-5214

Language

en

Exports