Abstract
The influence of carboxy methyl cellulose (CMC) and guargum-based coatings containing silver nanoparticles was studied on the postharvest storage stability of the kinnow mandarin (Citrus reticulata cv. Blanco) for a period of 120 days (85%–90% relative humidity) at 4 °C and 10 °C. Physicochemical and microbiological qualities were monitored after every 15 days of storage. Overall results revealed an increase in total soluble solid (TSS), total sugars, reducing sugars and weight loss but this increase was comparatively less significant in coated fruits stored at 4 °C. Ascorbic acid, total phenolics, and antioxidant activity was significantly enhanced in coated fruits stored at 4 °C. Titratable acidity significantly decreased during storage except for coated kinnow stored at 4 °C. In control samples stored at 10 °C, high intensity of fruit rotting and no chilling injury was observed. Total aerobic psychrotrophic bacteria and yeast and molds were noticed in all treatments during storage but the growth was not significant in coated fruits at 4 °C. Kinnow fruit can be kept in good quality after coating for four months at 4 °C and for 2 months at 10 °C.
Highlights
IntroductionBlanco) is a fruit in the citrus family
The data showed that kinnows stored at 10 ̋C were the least affected by Chilling injury (CI) but showed a high intensity of rotting
The results demonstrated that carboxy methyl cellulose (CMC)-Ag and guargum-Ag coatings can be best utilized to control dehydration and retard microbial growth in kinnows
Summary
Blanco) is a fruit in the citrus family. Grown in Pakistan, is a cross between the King Orange (Citrus nobilis) and Willow Leaf Orange (Citrus deliciosa) of riverside California [1]. Mandarins are cherished around the globe due to their nutritional value, physicochemical properties, natural antioxidants, and sensory attributes [2]. The natural polyphenols in oranges comprise some bioactive compounds like hesperidins, vitamin C, carotenoid, naringin, ferulic acid, hydrocinnamic acid, and cyaniding glucoside [3]. These plant metabolites are effective in boosting the immune system against coronary heart diseases, cancer, and various infections, and aidthe absorption of iron and zinc [4]
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