Quality of strawberries subjected to pre-harvest UV-C radiation

Nardello, Izabel Camacho; Cantillano, Rufino Fernando Flores; Ribeiro, Jardel Araújo; Vignolo, Gerson Kleinick; Malgarim, Marcelo Barbosa; Mello-Farias, Paulo Celso de

doi:10.1590/S1678-3921.pab2021.v56.01590

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Horticultural Science, Original Article • Pesq. agropec. bras. 56 • 2021 • https://doi.org/10.1590/S1678-3921.pab2021.v56.01590 copy

Quality of strawberries subjected to pre-harvest UV-C radiation

Qualidade de morangos submetidos à radiação UV-C pré-colheita

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The objective of this work was to evaluate the influence of the use of UV-C radiation at an intensity of 0.53 KJ m^-2, during strawberry (Fragaria x ananassa) cultivation, on the physicochemical and phytochemical parameters of the fruits. The used experimental design was completely randomized, in a single-factor arrangement with 11, 19, 29, and 39 UV-C applications and without UV-C application. The hue of the fruits was smaller at the end of the study period. pH varied in strawberries that received 39 applications of UV-C, and the soluble solids content differed with 19 applications. Antioxidant activity was lower in fruits with 11, 19, and 29 UV-C applications, whereas vitamin C content was lower only in fruits that received 29 applications. The use of UV-C radiation at an intensity of 0.53 KJ m^-2, during strawberry cultivation, affects the physicochemical and phytochemical parameters of the fruits, but does not cause losses in their quality.

Index terms:
Fragaria x ananassa; cultivation; nutritional characteristics; physical characteristics; ultraviolet application

Number of applications	pH		SS (°Brix)		TA (grams of citric acid 100 g^-1 of juice)		Hue (° H)
Number of applications	Without UV-C	With UV-C	Without UV-C	With UV-C	Without UV-C	With UV-C	Without UV-C	With UV-C
11	3.5ns	3.5ab	9.3ns	8.7ab	1.0ns	1.2a	33.1ns	33.4a
19	3.6ns	3.6a	7.6^* * Significant by Dunnet’s test, at 5% probability.	7.0c	0.9ns	0.8c	30.1ns	32.0ab
29	3.6ns	3.6a	9.1ns	7.9bc	1.0ns	1.0b	31.6ns	28.9b
39	3.6^* * Significant by Dunnet’s test, at 5% probability.	3.4b	10.4ns	9.7a	1.2ns	1.1ab	26.5^* * Significant by Dunnet’s test, at 5% probability.	28.6b
CV (%)	1.59		5.58		8.11		5.44

Number of applications	Anthocyanins⁽²⁾ (2) Milligram of cyanidin 3-glucoside per 100 g of fresh fruit.		Antioxidant activity⁽³⁾ (3) Milligram of Trolox per 100 g of fresh fruit.		Vitamin C⁽⁴⁾ (4) Milligram of ascorbic acid per 100 g of fresh fruit.		Total phenols⁽⁵⁾ (5) Milligram of gallic acid per 100 g of fresh fruit.
Number of applications	Without UV-C	With UV-C	Without UV-C	With UV-C	Without UV-C	With UV-C	Without UV-C	With UV-C
11	94.5^* * Significant by Dunnet’s test, at 5% probability.	60.3b	439.1^* * Significant by Dunnet’s test, at 5% probability.	346.0b	44.8^ns ns Nonsignificant.	44.9b	160.6^ns ns Nonsignificant.	141.7c
19	71.2^* * Significant by Dunnet’s test, at 5% probability.	144.8a	317.8^* * Significant by Dunnet’s test, at 5% probability.	403.2a	31.3^ns ns Nonsignificant.	36.8b	143.8^ns ns Nonsignificant.	141.8bc
29	161.3^ns ns Nonsignificant.	111.9a	305.2^* * Significant by Dunnet’s test, at 5% probability.	271.1c	42.6^* * Significant by Dunnet’s test, at 5% probability.	37.7b	168.1^ns ns Nonsignificant.	165.7ab
39	147.1^ns ns Nonsignificant.	155.4a	493.9^ns ns Nonsignificant.	447.7a	67.0^ns ns Nonsignificant.	59.1a	175.4^ns ns Nonsignificant.	177.8a
CV (%)	26.78		10.45		9.51		6.72

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