Document Type : Original Article
Authors
1 Department of Biosciences, Sardar Patel University, Vallabh Vidyanagar - 388120, Gujarat, India
2 Department of Food Technology, School of Agriculture and Food Technology, VIGNAN’s Foundation for Science, Technology and Research, Vadlamudi, Guntur - 522213, Andhra Pradesh, India
3 Dr. APJ Abdul Kalam Govt. College, Silvassa – 396230, U.T. of Darda and Nagar Haveli, India
Abstract
Purpose: The study examined the effectiveness of polysaccharide-based edible coatings enriched with citral microencapsulated in β-cyclodextrin for extending shelf-life and maintaining the quality of fresh-cut ‘Totapuri’ mango. Research Method: The sodium alginate (AG), carrageenan (CG), pectin (PT), and polycationic chitosan (CH) were applied as layer-by-layer through electrostatic deposition and single layer. The changes in quality properties of coated and uncoated fresh-cut ‘Totapuri’ mango were evaluated during 18 days of storage period at 5°C. Physicochemical properties like colour change, firmness, weight loss, carotenoids, vitamin C and phenolics were measured. Sensory characteristics such as color, taste, texture and odor were evaluated. Additionally, enzymatic activities of polygalacturonase, peroxidase, polyphenol oxidase and phenylalanine ammonia-lyase were evaluated and microbial growth was examined to check for contamination during storage. Findings: The application of AG and CH as single layer and layer-by-layer coatings especially AG+CH and CG+CH better maintained chroma (C), hue angle (h°), and lightness (L*), slowed down firmness and weight loss, retained carotenoids, vitamin C and phenolics as compared to single-layered and uncoated fresh-cut mango. Furthermore, layer-by-layer coatings of CH+AG and CH+CG reduced enzymatic activities of polygalacturonase (PG), peroxidase (POX), polyphenol oxidase (PPO) and phenylalanine ammonia-lyase (PAL) and prevented microbial growth during 18 days of storage at 5°C. The application of alginate and chitosan as single-layered and layer-by-layer on fresh-cut ‘Totapuri’ scored the highest overall consumer acceptability when compared to other coating treatments. Research limitations: There were no limitations. Originality/Value: The study suggest that application of AG and CH as single layer and layer-by-layer polysaccharide-based edible coating of CH+AG and CH+CG are effective and safe method of preserving the quality and extending the shelf-life of fresh-cut ‘Totapuri’ mango for 18 days at 5°C.
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