Effects of chitosan coating on quality and shelf life of tomato during CoolBot cold storage
Chitosan is produced as a high-value organic product from shrimp-shell waste of a local seafood factory, and has been shown to have potential production and postharvest applications. In this study, the chitosan product was applied as a pre-storage coating treatment in breaker tomatoes 'KK3'. Three chitosan concentrations were used, 0 (tap water, control), 0.5 and 1%, and the fruit were dipped in the solution for 5 min, air-dried, and stored in a CoolBot cold chamber (13°C) or under ambient conditions (25-32°C). Ripening-associated fruit reddening (a* values) and softening expectedly proceeded at a slower rate in the CoolBot chamber than under ambient conditions. Chitosan further slowed ripening both in the CoolBot chamber and at ambient. Similarly, weight loss was lower in fruit stored in the CoolBot chamber than that under ambient conditions. Chitosan further reduced weight loss in ambient-stored fruit. There was no distinct concentration effect of chitosan on ripening and weight loss. Total soluble solids and titratable acidity did not differ widely with treatment. The results indicate the potential of chitosan in improving the shelf life of tomatoes.
Leak, C., Buntong, B., Acedo, A.L., Easdown, W., Hughes, J.A. and Keatinge, J.D.H. (2017). Effects of chitosan coating on quality and shelf life of tomato during CoolBot cold storage. Acta Hortic. 1179, 107-110
Solanum lycopersicum, postharvest preservation, value addition