Quality of packaged refrigerated biofortified sweet potato cultivars

Combining refrigeration with packaging is a commonly used technique for fruits intended for export. Thus, the objective of this study was to adapt the post-harvest management of biofortified sweet potato cultivars, using packaging and refrigeration, focused on reaching distant export markets while maintaining the commercial quality. Sweet potatoes of the cultivars BRS-Amélia and Beauregard were selected after harvesting, washed, and packaged. The experimental design used was completely randomized, in a 4 × 7 factorial arrangement consisted of 4 treatments (cultivar BRS-Amélia with and without packaging; and cultivar Beauregard with and without packaging) and 7 evaluations under storage conditions: at 0, 7, 14 (under refrigeration at approximately 8 °C), 17, 20, 23, and 26 days (under room temperature conditions at approximately 25 °C). Each experimental unit contained 500 g of tubbers. The results showed that the refrigerated storage combined with packaging extended the shelf life of the evaluated sweet potatoes: 17 days for BRS-Amélia and 26 days for the cultivar Beauregard. The BRS-Amélia cultivar maintained higher firmness, soluble solids and carbohydrate contents, chroma, and antioxidant activity (FRAP method), and total phenolic contents, in both raw and cooked tissues. The cultivar Beauregard presented less dehydration and greater stability in vitamin C, total phenolic, total carotenoid, soluble carbohydrate, and starch contents in raw and cooked potatoes. Therefore, the combination of packaging and refrigeration preserved the commercial quality of biofortified sweet potatoes for export markets.

Key words:
Ipomoea batatas; phenolic compounds; vitamin C

Treatments	Day	L*	C*
BRS-Amélia without packaging	0	35.3 ± 5.63 aA	22.23 ± 3.33 b
	7	31.46 ± 2.79 aA	43.89 ± 24.65 b
	14	41.45 ± 15.67 aA	28.09 ± 11.34 b
	17	37.17 ± 1.08 aA	25.84 ± 1.14 b
	20	30.46 ± 1.25 aA	23.79 ± 1.12 b
	23	33.74 ± 3.39 aA	23.72 ± 2.15 b
	26	30.67 ± 6.03 aA	19.76 ± 3.2 b
BRS-Amélia with packaging	0	35.3 ± 5.63 aA	22.23 ± 3.33 a
	7	28.88 ± 1.87 aA	24.28 ± 2.72 a
	14	26.09 ± 2.87 aA	20.99 ± 2.67 a
	17	37.28 ± 3.2 aA	26.80 ± 1.48 a
	20	34.52 ± 5.27 aA	43.50 ± 21.12 a
	23	40.16 ± 3.78 aA	29.09 ± 1.83 a
	26	31.26 ± 1.92 aA	46.58 ± 22.29 a
Beauregard without packaging	0	40.73 ± 4.91 aA	22.48 ± 1.67 ab
	7	39.97 ± 3.33 aA	25.87 ± 1.33 ab
	14	27.81 ± 2.71 aA	23.50 ± 3.70 ab
	17	34.39 ± 2.41 aA	22.71 ± 0.88 ab
	20	35.96 ± 6.19 aA	21.79 ± 2.28 ab
	23	32.68 ± 2.93 aA	21.68 ± 1.42 ab
	26	27.76 ± 4.72 aA	15.86 ± 1.49 ab
Beauregard with packaging	0	40.73 ± 4.91 aA	22.48 ± 1.67 ab
	7	35.89 ± 3.53 aA	23.58 ± 1.80 ab
	14	33.51 ± 4.21 aA	23.73 ± 1.82 ab
	17	42.91 ± 5.43 aA	30.39 ± 2.38 ab
	20	43.82 ± 4.5 aA	29.18 ± 1.24 ab
	23	31.02 ± 1.46 aA	24.58 ± 1.27 ab
	26	36.61 ± 3.03 aA	30.32 ± 4.07 ab

Unidade Acadêmica de Engenharia Agrícola Unidade Acadêmica de Engenharia Agrícola, UFCG, Av. Aprígio Veloso 882, Bodocongó, Bloco CM, 1º andar, CEP 58429-140, Campina Grande, PB, Brasil, Tel. +55 83 2101 1056 - Campina Grande - PB - Brazil
E-mail: revistagriambi@gmail.com

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[1] * Corresponding author - E-mail: adriano.simoes@ufrpe.br

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Quality of packaged refrigerated biofortified sweet potato cultivars1 1 Research developed at Universidade Federal do Rio Grande do Norte, Macaíba, RN, Brazil

Qualidade de cultivares de batata-doce biofortificadas refrigeradas e embaladas

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ABSTRACT

Quality of packaged refrigerated biofortified sweet potato cultivars¹ 1 Research developed at Universidade Federal do Rio Grande do Norte, Macaíba, RN, Brazil