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Article

Application of Gum Arabic and Methyl Cellulose Coatings Enriched with Thyme Oil to Maintain Quality and Extend Shelf Life of “Acco” Pomegranate Arils

1
Department of Horticultural Science, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa
2
Postharvest Technology Research Laboratory, Faculty of AgriSciences, Africa Institute for Postharvest Technology, South African Research Chair in Postharvest Technology, Stellenbosch University, Private Bag X1, Stellenbosch 7602, South Africa
3
Postharvest Research Laboratory, Department of Botany and Plant Biotechnology, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg 2006, South Africa
*
Authors to whom correspondence should be addressed.
Plants 2020, 9(12), 1690; https://doi.org/10.3390/plants9121690
Received: 20 October 2020 / Revised: 15 November 2020 / Accepted: 25 November 2020 / Published: 1 December 2020
(This article belongs to the Special Issue Natural Products from Plant-Derived as Preservatives)
The effects of gum arabic (GA; 1.5% w/v) and methyl cellulose (MC; 1% w/v) enriched with thyme oil (TO; 0.25 and 0.5% v/v) on the quality of “Acco” pomegranate arils were studied. Coating treatments, namely, MC, MC + TO0.5%, MC + TO0.25%, GA, GA + TO0.5% and GA + TO0.25% were applied on arils by dipping, and evaluations were made on physicochemical and microbiological quality, phytochemicals and antioxidant capacity of arils stored (5 ± 1 °C, 95 ± 2% RH) for 16 days. Dipping arils in GA or MC, both containing TO (0.5% v/v) significantly (p < 0.0001) reduced weight loss and enhanced antioxidant activity (FRAP) (p = 0.0014). However, dipping arils in GA combined with TO (0.25% v/v) had the highest influence on reducing aril respiration rate compared with other treatments. Overall, results showed that application of coatings (GA + TO0.5% and GA + TO0.25%) reduced total yeast and mould and total plate counts and maintained quality up to 8 days of storage. These findings suggest that either GA + TO0.5% or GA + TO0.25% coatings have the capability to extend storage life of “Acco” pomegranate arils. View Full-Text
Keywords: pomegranate; weight loss; total yeast and mould; antioxidant capacity pomegranate; weight loss; total yeast and mould; antioxidant capacity
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MDPI and ACS Style

Kawhena, T.G.; Tsige, A.A.; Opara, U.L.; Fawole, O.A. Application of Gum Arabic and Methyl Cellulose Coatings Enriched with Thyme Oil to Maintain Quality and Extend Shelf Life of “Acco” Pomegranate Arils. Plants 2020, 9, 1690. https://doi.org/10.3390/plants9121690

AMA Style

Kawhena TG, Tsige AA, Opara UL, Fawole OA. Application of Gum Arabic and Methyl Cellulose Coatings Enriched with Thyme Oil to Maintain Quality and Extend Shelf Life of “Acco” Pomegranate Arils. Plants. 2020; 9(12):1690. https://doi.org/10.3390/plants9121690

Chicago/Turabian Style

Kawhena, Tatenda G.; Tsige, Alemayehu A.; Opara, Umezuruike L.; Fawole, Olaniyi A. 2020. "Application of Gum Arabic and Methyl Cellulose Coatings Enriched with Thyme Oil to Maintain Quality and Extend Shelf Life of “Acco” Pomegranate Arils" Plants 9, no. 12: 1690. https://doi.org/10.3390/plants9121690

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