Aplicação de Smartfresh TM em pera Rocha. Eficácia de concentrações e modalidades de armazenamento na qualidade e na incidência de escaldão superficial e acastanhamento interno

• Author(s): Carvalho, Ana Rita Santos Correia de
• Date: 2011
• Persistent ID: http://hdl.handle.net/10400.5/4487
• Origin: Repositório da UTL
• Subject(s): Pyrus communis; 1-methylcyclopropene; storage; controlled atmosphere; diphenylamine; postharvest
• Document Type: Master thesis
• Language: Portuguese
• Advisor(s): Oliveira, Cristina Maria Moniz Simões
• Contributor(s): Repositório da Universidade de Lisboa

Description

Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia

Efficacy of the ethylene action inhibitor 1-methylcyclopropene (1-MCP) was evaluated in pear (Pyrus communis L.) ‘Rocha’ in comparison with the standard postharvest treatments currently used by the Portuguese pear industry. Fruit were harvested at commercial maturity from four representative orchards in the Oeste Region, Portugal, subjected to the postharvest treatments and stored at 0 ºC, 90-95% relative humidity, under normal atmosphere, for up to 6 months; under controlled atmosphere, for up 9 months, and 9 months under delayed controlled atmosphere with the first 2 months in normal air. 1-MCP, at the recommended dosis of 312 nL L-1, reduced fruit softening and skin yellowing, and increased the soluble solids content (SSC) of ‘Rocha’ pear during shelf-life (14 days) at room temperature following cold storage in comparison with control fruit. SmartFresh at the recommended dosis of 312 nL L-1 of 1-MCP was also more effective than the standard postharvest treatments in reducing the incidence of superficial scald and internal browning disorders in ‘Rocha’ pear. It is concluded that 1-MCP at 312 nL L-1 is effective in reducing physiological disorders in ‘Rocha’ pear under refrigerated storage and controlled atmosphere and in delaying ripening-related softening and color changes during shelf-life.