Abstract
This study was done to evaluate the effect of pre-harvest foliar application with chitosan (500 and 1000 mg L−1), Nano-chitosan (250 and 500 mg L−1), and chitosan/ZnO nanocomposite (250 and 500 mg L−1) coatings on the quality and shelf life of fresh pistachios of “Akbari” and “Ahmad Aghaei” cultivars during storage. The results showed that 250 and 500 mg L−1 of chitosan/ZnO coatings significantly affected the shelf life of pistachios up to 35 and 40 days, respectively; in addition, chitosan/ZnO nanocomposite in both cultivars reduced weight loss, aflatoxin contamination, decay, polyphenol oxidase and glutathione-peroxidase enzymes, peroxide value, free fatty acids, and improve firmness, sensory properties, protein, oil content, carbohydrate, antioxidant properties, anthocyanin, phenol, and flavonoid. These results indicated that using chitosan/ZnO (250 and 500 mg L−1) is a promising efficient, safe, and environmentally friendly method for preserving the quality of fresh pistachios. It reduces hull browning and minimizes post-harvest losses.
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