Prevention of Chilling Injury in 'Tommy Atkins' Mangoes Previously Stored at 5 ºc, Using Heat Treatment and Radiation Uv (Uv-C)

Abstract

-the objective of this study was to evaluate the effect of heat treatment and ultraviolet radiation (uV-C) in the prevention of chilling injury in mangoes cv. tommy Atkins previously stored or not under injury condition after their transference to ambient condition. Fruits were divided into groups: two were hydrothermally treated (46.1 ºC/90 min; 55 ºC/5 min) and two were exposed to uV-C radiation (1.14 kJ m -2 ; 2.28 kJ m -2 ). these groups were stored under chilling injury conditions (5 ºC for 14 days), as established in preliminary tests. other untreated groups were stored at 12 ºC or 5 ºC. After the storage period, they were transferred to ambient conditions (21.9 ºC; 55% Rh) and the quality was evaluated. All the data were submitted to multivariate analysis as the tool to verify the simultaneous effect of the treatments under the quality parameters. the multivariate analysis indicated that the hydrothermal treatments at 46.1 °C/90 min and 55 °C/5 min and the uV-C radiation at doses of 1.14 kJ m -2 and 2.28 kJ m -2 were effective in minimized the symptoms of chilling injury in mangoes 'tommy Atkins' stored at 5 °C for 14 days. however, after their transference to environmental condition at 21.9 °C, only the uV-C kept this control, especially at a dose of 2.28 kJ m -2 . this treatment did not prevent the development of the characteristic color or affected the normal ripening and allowed the conservation of fruit for a period of 14 days at 5 °C, plus seven days of storage at environmental condition, which corresponds to the shipping transportation plus the time for sale. Index terms: Mangifera indica, ultraviolet radiation, thermal treatment, factor analysis, cluster analysis. PREVENÇÃO DE INJÚRIAS PELO FRIO EM MANGAS 'TOMMY ATKINS' PREVIAMENTE ARMAZENADAS A 5 ºC, USANDO-SE TRATAMENTO TÉRMICO E RADIAÇÃO ULTRAVIOLETA (UV-C)RESUMO -o objetivo deste trabalho foi avaliar o efeito do uso de tratamento térmico e da radiação ultravioleta (uV-C) na prevenção de danos pelo frio em mangas cv. tommy Atkins previamente armazenadas ou não sob condição injuriante, depois de transferidas para condição de ambiente. Frutos foram divididos em grupos: dois foram tratados hidrotermicamente (46,1 °C/90 min; 55 ºC/5 min) e dois foram expostos a radiação uV-C (1,14 kJ m -2 ; 2,28 kJ m -2 ). esses grupos foram armazenados em condição injuriante (5 ºC por 14 dias), conforme estabelecido em testes preliminares. outros grupos não tratados foram armazenados a 12 ºC ou 5 ºC. Após o período de armazenamento, foram transferidos para condição ambiente (21,9 °C; 55% hR) e avaliados quanto à qualidade. todos os dados foram submetidos à análise multivariada como ferramenta para verificar o efeito simultâneo dos tratamentos sobre os parâmetros de qualidade. A análise multivariada indicou que o tratamento térmico afetou negativamente o desenvolvimento da cor normal da casca das mangas, reduziu a capacidade antioxidante e injuriou o fruto, como indicado pela elevada atividade da PAl. o dano pelo frio relacionou-se com a diminuição da ativ...

Effect of UV-C Postharvest Disinfection on the Quality of Fresh-Cut 'Tommy Atkins' Mango

“…During mango ripening, green chloroplasts become chromoplasts with red and yellow tones. These tones in mango are mainly derived from β-carotene, which is accumulated in the chromoplasts in the form of crystalloids [Miguel et al, 2016]. For the control mango, b* coordinate value increased throughout cold storage (Table 1).…”