Abstract
ABSTRACT The fresh in-hull pistachio fruit was sprayed with 1% calcium oxide (CaO), 10 mM w/v γ-aminobutyric acid (GABA), 1% carboxymethyl cellulose (CMC), and their combination (CMC+GABA+CaO) for 30 sec at room temperature. Spraying with distilled water was considered as a control. Following drying of fruits at room temperature, they were packed in perforated polyethylene terephthalate containers and kept under cold storage (at 2 ± 1 °C with 85 ± 2% RH) for 75d. Pistachios treated showed the lower weight loss, and the highest hull safety, taste, aroma, and overall acceptance than control. Total chlorophyll and anthocyanin of fresh pistachio kernel were preserved by combined treatment. Combined treatment reduced the PPO, POD, PAL activity and MDA content of the hull and maintained kernel phenolic compounds compared to other treatments. Besides these, the best effects were obtained with combined treatment, which maintained the physical, biochemical and visual characteristics of the fresh fruit for 50 days.
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