A Study on the Effect of Nanosilicate-Based Coatings on Storage Life of Pomegranate Cultivar Malas-E-Saveh

Subject Areas : Microbiology

A. Bekran ¹ (M. Sc. Graduate Student of the Department of Horticultural Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.)
E. Seifi ² (Associate Professor of the Department of Horticultural Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.)
F. Varasteh ³ (Assistane Professor of the Department of Horticultural Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.)

Received: 2018-11-21 Accepted : 2018-11-21 Published : 2018-12-22

Keywords: Nano Silicate Clay, Packaging, Polyethylene, Polypropylene, Pomegranate, Storage Life,

Abstract :

Introduction: The high nutritional and medicinal values and the increasing production anddemands, it is important to control the factors affecting the quality of pomegranate fruitduring storage. Regarding the understanding of how to store pomegranate fruit, it would bepossible to offer this product at local and international markets for a long duration with highquality.Materials and Methods: In this study, the effect of nano silicate-based polyethylene andpolypropylene on the storage life of pomegranate fruit (cultivar Malas-e-Saveh) has beenstudied in a completely randomized factorial design. The treated fruits were stored in commonstorage for two and four months period. Qualitative and quantitative characteristics of fruitswere measured using the standard methods of analysis.Results: The results showed that the nano-based polyethylene and polypropylene couldmaintain the highest amount of moisture in the skin (75.72% and 73.14%, respectively) ascompared to the control (26.64%) at the end of storage period. These coating treatments alsomaintained the highest amount of aril moisture (76.88%) as compared to the control(71.09%). After storage period, the nano-based polypropylene showed the highestconcentrations of phenolic compounds (883.54 mg GAE/100 ml), flavonoids (487.71 mgGAE/100 ml) and anthocyanins (11.69 mg C3GE/100 ml) as compared to the control (649.76and 437.56 mg GAE/100 ml, and 7.9 mg C3GE/100 ml, respectively); although the normalcoating treatments showed less influence. Nano-based coating treatments also decreased thechanging rate of ascorbic acid but did not have any significant influence on pH and EC.Conclusion: The application of nano-based polyethylene and polypropylene treatments isrecommended to improve the keeping quality of pomegranate fruit during storage.

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