A aplicação de 1-metilciclopropeno (1-MCP) aumenta a conservação pós-colheita de peras

Mateus Da Silveira Pasa,Robson Rodrigues Pereira,Juan Saavedra Del Aguila,Carina Pereira Da Silva,Émerson De Franceschi,José Carlos Fachinello,Horacy Fagundes Da Rosa Júnior

doi:10.5965/223811711722018206

Abstract

One of the strategies to maintain fruit quality and increase storage time of climacteric fruit such as pear is the use of 1-methylcyclopropene (1-MCP), reducing the effects of ethylene, which is the main responsible for fruit ripening. The aim of this study was to evaluate the influence of 1-MCP on post-harvest fruit quality of ‘Abate Fetel’, ‘Packham’s’ and ‘Tenra’ pears in regular air cold storage. The fruit were treated with 1-MCP inside sealed plastic boxes at 20 oC, for 14 hours, and then transferred to cold storage (0 °C ± 1 °C; 85% ± 5% UR), where they were kept during 30, 60, 90, and 120 days. The assessed parameters were flesh firmness, DA index, pH of juice, titratable acidity and soluble solids. It was observed that 1-MCP was efficient in maintaining fruit flesh firmness of the studied cultivars kept in cold storage. Also, the degradation of chlorophyll in fruits of ‘Abate Fetel’ and ‘Packham’s’ pear was reduced with 1-MCP application.

Highlights

One of the strategies to maintain fruit quality and increase storage time of climacteric fruit such as pear is the use of 1-methylcyclopropene (1-MCP), reducing the effects of ethylene, which is the main responsible for fruit ripening
The aim of this study was to evaluate the influence of 1-MCP on post-harvest fruit quality of ‘Abate Fetel’, ‘Packham’s’ and ‘Tenra’ pears in regular air cold storage
The fruit were treated with 1-MCP inside sealed plastic boxes at 20 oC, for 14 hours, and transferred to cold storage (0 °C ± 1 °C; 85% ± 5% UR), where they were kept during 30, 60, 90, and 120 days

Summary

MATERIAL E MÉTODOS

O experimento foi realizado na safra 2011-2012 no Laboratório de Fruticultura de Clima Temperado na Faculdade de Agronomia Eliseu Maciel (FAEM), da Universidade Federal de Pelotas (UFPel), no município do Capão do Leão, RS. Índice DA e sólidos solúveis para as cultivares estudas, no momento da colheita, foram: ‘Tenra’ - 51,99N, Índice DA 1,98 e 10,28 °brix; ‘Packham’s Triumph’ - 64,05 N, Índice DA 1,91 e 14,44 °brix; ‘Abate Fetel’ 68,71 N, Índice DA 1,76 e 13,45 °brix. RESULTADOS Para a cultivar Abate Fetel, foi observada interação entre os fatores período de armazenamento e tratamento com 1-MCP para a variável firmeza de polpa (FP) (Tabela 1). Considerando-se o tratamento com 1MCP em cada período de armazenamento, os frutos submetidos a aplicação de 1-MCP apresentaram maior firmeza que o controle em todos os períodos de armazenamento, exceto aos 60 dias AF (Tabela 1). Índice DA, pH do suco, acidez titulável e sólidos solúveis de peras ‘Abate Fetel’ e ‘Packham’s’ tratadas em pós-colheita com com 300 μg L-1 de 1-metilciclopropeno (1-MCP), em diferentes períodos de armazenamento

PA x T

Períodos de Armazenamento