Application of microperforated films to maintain quality traits of '13S-3-13' sweet cherries

摘要

Currently, the '13S-3-13' cultivar is being recommended due to its good agronomic traits in the Jerte Valley region. However, no data are available on its behavior during long time storage. For this reason, the effectiveness of 2 biaxially oriented polypropylene (BOPP) microperforated films of different transmission rates on storage stability of '13S-3-13' sweet cherries were studied. Fruits were harvested totally at random from multiple trees and transported to the distribution centre in less than 1h. They were then hydrocooled at a water temperature of 1°C. Sodium hypochlorite was added to the water to achieve a chlorine concentration of 100 pL L1. Then the cherries were packaged in polypropylene trays and sealed with different microperforated films: film with 16 holes (M10) and microperforated film with 3 holes (M50). As control, fruit was packaged in (BOPP) macroperforated film with five holes (0=9 mm). All treatments were stored during 50 days at 1°C and with RH of 95% in darkness. Gas concentration in trays, weight loss, firmness, total soluble solids, titratable acidity, pH, and microbial population of total mesophilic aerobic, anaerobic and psychrotrophic bacteria as well as moulds and yeasts were analyzed after 0, 7,14, 21, 35, and 50storage days. The results indicated that sweet cherries stored under microperforated film M50 had reduced rates of deterioration, since cherries presented higher values for firmness, and titratable acidity than control. Moreover, this microperforated film was also effective to control the growth of yeasts after 50 days of storage.