Conservação de caqui 'Fuyu' com o tratamento em pré-colheita e pós-colheita com 1-metilciclopropeno

Abstract

Resumo -O objetivo deste trabalho foi comparar os efeitos da pulverização pré-colheita de 1-metilciclopropeno aquoso (1-MCPa) e tratamento pós-colheita de 1-metilciclopropeno gasoso (1-MCPg) sobre a maturação e a qualidade de caqui (Diospyros kaki) 'Fuyu'. Pulverizaram-se 150 mg L -1 de 1-MCPa nas plantas, na primeira semana de colheita comercial. Os frutos foram colhidos aos 1, 7, 14 e 21 dias, após a pulverização do 1-MCPa (DAAM), e tratados ou não com 0,6 µL L -1 de 1-MCPg, um dia após a colheita. Os tratamentos constituíram-se de controle, 1-MCPa, 1-MCPg e 1-MCPa+1-MCPg. Os frutos foram armazenados por 70 dias a 0 o C, em atmosfera modificada (AM), seguido por sete dias a 23ºC. O tratamento com 1-MCPa não afetou a maturação dos frutos na planta, mas reduziu o amolecimento prematuro de polpa e o distúrbio mancha translúcida em pós-colheita. A incidência de frutos moles após a armazenagem (média de três anos) foi superior a 84% no controle e inferior a 18% com 1-MCPg, independentemente da época de colheita, e de 15, 34, 40 e 75%, quando os frutos foram tratados com 1-MCPa e colhidos 1, 7, 14 e 21 DAAM, respectivamente. A eficácia do 1-MCPa em frutos colhidos 1 DAAM é semelhante à do 1-MCPg e é reduzida com o atraso da colheita dos frutos a partir da data de sua aplicação.Termos para indexação: Diospyros kaki, atmosfera modificada, distúrbios fisiológicos, etileno, fruto, dano por frio. Fruit quality preservation of 'Fuyu' persimmon by preharvest and postharvest treatments with 1-methylcyclopropeneAbstract -The objective of this work was to compare the effects of preharvest spraying of aqueous 1-methylcyclopropene (1-MCPa) and of postharvest treatment of gaseous 1-methylcyclopropene (1-MCPg) on fruit maturity and quality of 'Fuyu' persimmon (Diospyros kaki). Spraying of 150 mg L -1 1-MCPa was done on trees in the first week of commercial harvesting. Fruit were harvested at 1, 7, 14, and 21 days after 1-MCPa spraying (DAMS), and treated or not with 0.6 µL L -1 1-MCPg one day after harvest. The treatments consisted of a control, 1-MCPa, 1-MCPg, and 1-MCPa+1-MCPg. Fruit were stored at 0°C for 70 days in modified atmosphere, followed by seven days at 23°C. The treatment with 1-MCPa did not affect fruit maturity on trees, but reduced the premature flesh softening and the occurrence of translucent stain disorder at postharvest. The incidences of soft fruit after storage (average of three years) were higher than 84% for the control, and lower than 18% for fruit treated with 1-MCPg, regardless of fruit harvesting date, and they were 15, 34, 40, and 75% for fruit treated with 1-MCPa and harvested at 1, 7, 14, and 21 DAMS, respectively. The efficacy of 1-MCPa is equivalent to that of 1-MCPg for fruit harvested at 1 DAMS and its is reduced by delaying fruit harvest from the date of its application.

Different vacuum packages for 'giombo' persimmon postharvest conservation

“…Resultados inferiores aos encontrados por Vieites et al (2012), que obtiveram valores médios, para sólidos solúveis, variando entre 15 e 21 ºBrix em seu trabalho sobre a influência de radiação gama em caquis 'Giombo'. Vieira et al (2016) observaram acréscimo no teor de sólidos solúveis ao longo do armazenamento de caqui 'Fuyu' tratado com 1-metilciclopropeno, variando de 13,6 a 17,4 ºBrix durante o experimento, sendo este comportamento e seus valores mais próximos aos apresentados neste trabalho.…”

Effect of Preharvest 1-MCP Treatment on the Flesh Firmness of ‘Rojo Brillante’ Persimmon

“…The obtained results show that the combination of pre-and postharvest 1-MCP application optimizes the fruit capacity to retain ripening and reduce the incidence of disorders during cold storage, resulting in a higher fruit firmness as well as longer ethylene suppression. In persimmon, only a study on the cultivar 'Fuyu' compared the effects of pre-and post-MCP treatments on the fruit quality during maturity, and positive results were found with the pre-MCP application [10].…”

“…In persimmon, information about the effect of preharvest 1-MCP application is scarce. Only one study about the 'Fuyu' cultivar has reported a positive effect of this treatment on retarding fruit maturity on trees [10].…”

Phenology, yield and fruit quality of four persimmon (Diospyros kaki L.) cultivars in So Paulos Midwest countryside, Brazil

“…In order to meet quality demanded standards from the consumer market, there is a need to expand the research field for knowledge regarding persimmon cropping, including aspects ranging from nutrition, irrigation and plants" canopy handling to before and after harvest studies (Biasi et al, 2007;Souza et al, 2011;Vieira et al, 2016), considering that these factors might be affected by growing"s location and chosen crop. The fruit farm, for instance, when led according to different growth stages, allows strategies and decisions to be defined beforehand, which contributes to improving the crops" efficiency and yield (Corsato et al, 2005).…”