Abstract
This study was carried out for two successive seasons 2020 and 2021 in order to evaluate the efficiency dipping of Wonderful pomegranate and Anna apple fruits in potassium sorbate (K-sorb.) at 3% / 2 min to maintain fruit quality and control postharvest diseases caused by Penicillium spp. ( P. italicum and P. sp.) during cold storage. Fruits were stored at 5°C and 85-90% RH for 75 days. The reduction in linear growth was correlated to the increase in potassium sorbate concentrations. Potassium sorbet at 0.06% concentration gave the maximum inhibition of the linear growth of Penicillium spp. Also, the application of potassium sorbate showed the best results in reducing the deterioration of various physical and chemical characteristics of ‘Wonderful’ pomegranate and ‘Anna’ apple fruits during cold storage and extending its storability. Potassium sorbate treatments mitigated the incidence of fruit decay and successfully decreased fruit weight loss and increased SSC: TA ratio, the total phenolic content, and activities of peroxidase and catalase enzymes relative to the control treatment.
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