Microbial populations of Botrytis cinerea-inoculated strawberry fruit exposed to four volatile compounds.
Ntirampemba, G.; Langlois, B. E.; Archbold, D. D.; Hamilton-Kemp, T. R.; Barth, M. M.;
Journal of Food Protection Year: 1998 Vol: 61 Issue: 10 Pages: 1352-1357 Ref: 25 ref.
1998
บทคัดย่อ
Aerobic, microaerophilic, coliform and mould populations of B. cinerea-inoculated strawberry fruits not exposed (control) or exposed to low and high quantities of 4 volatile compounds during storage were determined after 7 days' storage at 2 deg C and after removal of the volatile and transfer to 22 deg C for 3 days. Fruits harvested at the ripe stage were inoculated with 106 conidia B. cinerea/ml and were placed in plastic containers containing no volatile compound (control) or 2 quantities of (E)-2-hexenal (10 or 100 micro litre), (E)-2-hexenal diethyl acetal (30 or 300 micro litre), benzaldehyde (30 or 300 micro litre) or methyl benzoate (12 or 60 micro litre). The containers were overwrapped with a low-density polyethylene film and sealed. Aerobic, microaerophilic and coliform populations of fruits exposed to volatile compounds tended to be lower than the controls after storage at 2 deg C for 7 days and, depending on the volatile compound, similar, lower or higher than the controls after tra
nsfer and storage at 22 deg C. However, due to variability in initial aerobic, microaerophilic and coliform populations of the fruits used in the different trials (P < 0.05), none of the differences between control and treatment, or between treatments, within a sample time were significant (P > 0.05). Exposure to 100 micro litre of (E)-2-hexenal was the only treatment that did not show a significant increase in mould populations after transfer to 22 deg C for 3 days. The results suggest additional studies are needed to determine if (E)-2-hexenal can be used in combination with other postharvest storage conditions, such as low temperature and controlled/modified atmosphere, to delay spoilage and extend the shelf-life of strawberries.