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Hydroxypropyl Methylcellulose-Based Edible Coatings Formulated with Antifungal Food Additives to Reduce Alternaria Black Spot and Maintain Postharvest Quality of Cold-Stored ‘Rojo Brillante’ Persimmons

Centre de Tecnologia Postcollita (CTP), Institut Valencià d’Investigacions Agràries (IVIA), 46113 Montcada, Valencia, Spain
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Academic Editors: Anna Kocira and Katarzyna Panasiewicz
Agronomy 2021, 11(4), 757; https://doi.org/10.3390/agronomy11040757
Received: 16 March 2021 / Revised: 6 April 2021 / Accepted: 9 April 2021 / Published: 13 April 2021
Composite edible coatings based on hydroxypropyl methylcellulose (HPMC), as a polymeric phase, and oleic acid (OA) or beeswax (BW), as a hydrophobic phase, were formulated with different food additives as antifungal ingredients. HPMC–OA coatings containing 2% (w/v) sodium benzoate (SB), 1% ammonium carbonate (AC), 1% potassium carbonate (PC), 1% potassium bicarbonate (PBC), 1% sodium bicarbonate (SBC), 1% potassium silicate (PSi), 0.1% sodium methyl paraben (SMP) or 0.1% sodium ethyl paraben (SEP), and HPMC–BW coatings containing 2% sodium propionate (SP), 2% PBC, 2% SB or 0.1% SEP were evaluated for the control of Alternaria black spot (ABS) on Diospyros kaki Thunb. ’Rojo Brillante’ persimmons artificially inoculated with Alternaria alternata. After 14 days of incubation at 20 °C, HPMC–OA coatings formulated with PBC, PC or SEP were the most effective to reduce ABS incidence (61, 54, and 36% reduction, respectively, concerning uncoated control fruit) and severity (28, 12 and 22% reduction, respectively), while only HPMC–BW coatings formulated with SEP significantly reduced ABS incidence (50% reduction) and severity (36% reduction). HPMC–OA and HPMC–BW coatings containing 2% PBC or 0.1% SEP were selected to evaluate their effect on the weight loss, firmness and respiration rate of healthy ‘Rojo Brillante’ persimmons cold-stored at 1 °C and 90% relative humidity (RH) for 15 and 30 days, followed by 7 days of shelf life at 20 °C. HPMC–BW coatings were more effective in reducing fruit weight and firmness losses than HPMC–OA coatings, while all antifungal coatings significantly reduced fruit respiration. Overall, the HPMC–BW edible coating that contains SEP could be a promising postharvest treatment to control ABS and maintain the quality of cold-stored ‘Rojo Brillante’ persimmons. View Full-Text
Keywords: Diospyros kaki; Alternaria alternata; alternative postharvest disease control; generally recognized as safe (GRAS) substances; postharvest quality Diospyros kaki; Alternaria alternata; alternative postharvest disease control; generally recognized as safe (GRAS) substances; postharvest quality
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MDPI and ACS Style

Fernández-Catalán, A.; Palou, L.; Taberner, V.; Grimal, A.; Argente-Sanchis, M.; Pérez-Gago, M.B. Hydroxypropyl Methylcellulose-Based Edible Coatings Formulated with Antifungal Food Additives to Reduce Alternaria Black Spot and Maintain Postharvest Quality of Cold-Stored ‘Rojo Brillante’ Persimmons. Agronomy 2021, 11, 757. https://doi.org/10.3390/agronomy11040757

AMA Style

Fernández-Catalán A, Palou L, Taberner V, Grimal A, Argente-Sanchis M, Pérez-Gago MB. Hydroxypropyl Methylcellulose-Based Edible Coatings Formulated with Antifungal Food Additives to Reduce Alternaria Black Spot and Maintain Postharvest Quality of Cold-Stored ‘Rojo Brillante’ Persimmons. Agronomy. 2021; 11(4):757. https://doi.org/10.3390/agronomy11040757

Chicago/Turabian Style

Fernández-Catalán, Asunción, Lluís Palou, Verònica Taberner, Amparo Grimal, Maricruz Argente-Sanchis, and María B. Pérez-Gago 2021. "Hydroxypropyl Methylcellulose-Based Edible Coatings Formulated with Antifungal Food Additives to Reduce Alternaria Black Spot and Maintain Postharvest Quality of Cold-Stored ‘Rojo Brillante’ Persimmons" Agronomy 11, no. 4: 757. https://doi.org/10.3390/agronomy11040757

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