Obande et al~revised.pdf (198.53 kB)
Effect of preharvest UV-C treatment of tomatoes (Solanum lycopersicon Mill.) on ripening and pathogen resistance
journal contribution
posted on 2011-08-12, 10:14 authored by Matthew A. Obande, Gregory A. Tucker, Gilbert ShamaTreatment with UV-C of tomato fruit on the vine was conducted using a mobile unit that was designed
to be conveyed between the rows of tomato plants in a commercial glasshouse. Trusses of fruit both at
the ripe and mature green phase were treated with UV-C doses of 3 and 8 kJ/m2. Ripe fruit were picked
8 h after treatment and kept at room temperature for up to 16 d during which colour development and
texture were monitored and compared to untreated controls. Mature green fruit treated on the vine with
UV-C doses of 3 or 8 kJ/m2 showed only a slight loss in green pigmentation in contrast to the tomato colour
index (TCI) of control fruit which increased sharply 5 d after treatment. The TCI of ripe fruit treated with
UV-C at a dose of 8 kJ/m2 showed a lag of 10 d before increasing to a final value comparable to that of
untreated fruit. Fruit treated with a dose of 3 kJ/m2 did not display a lag but the increase in TCI occurred at
a lower rate than for the controls. Firmness remained higher in fruit treated with the highest UV-C dose
compared to fruit treated with the lower UV-C dose and controls. Fruit covered with UV impermeable
film on the same plants as those that had received a UV-C dose of 3 kJ/m2 had become ripe by day 6 in
a manner similar to that of the controls. By contrast, fruit from trusses adjacent to those that had been
treated with a UV-C dose of 8 kJ/m2 remained green over the same period of time. Ripe fruit treated
as described above were inoculated with spores of Penicillium digitatum after UV-C treatment and their
firmness monitored over 12 d. A dose response effect was found with fruit treated at the highest dose
remaining firmer than those treated at the lower dose and the controls.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
Citation
OBANDE, M.A., TUCKER, G.A. and SHAMA, G., 2011. Effect of preharvest UV-C treatment of tomatoes (Solanum lycopersicon Mill.) on ripening and pathogen resistance. Postharvest Biology and Technology, 62 (2), pp. 188-192.Publisher
© ElsevierVersion
- SMUR (Submitted Manuscript Under Review)
Publication date
2011Notes
This article was published in the journal, Postharvest Biology and Technology [© Elsevier]. The definitive version is available from: http://www.sciencedirect.com/science/article/pii/S0925521411001359ISSN
0925-5214Publisher version
Language
- en