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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 69, No. 3, 2009, pp. 383-390
Bioline Code: cj09046
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 69, No. 3, 2009, pp. 383-390

 es Efecto del sistema de enfriamiento y 1-mcp sobre la incidencia de escaldado superficial en manzanas 'granny smith'
Moggia, Claudia; Hernández, Omar; Pereira, Marcia; Lobos, Gustavo A. & Yuri, José Antonio

Resumen

Se desarrolló un estudio para determinar el efecto de dos sistemas de enfriamiento y la aplicación de 1-metilciclopropeno (1-MCP, SmartFreshTM) sobre la incidencia de escaldado superficial en manzanas ( Malus domestica check for this species in other resources Borkh.) cv. Granny Smith, colectadas de un huerto comercial (Colbún, Región del Maule, Chile) durante la temporada 2004-2005. El ensayo consistió en un diseño completamente al azar con arreglo factorial 2 x 2, usando sistema de enfriamiento (normal y lento) y aplicación de 1-MCP (0 y 625 nL L-1 i.a.) como factores. Fruta con enfriamiento normal se mantuvo a 0 °C durante todo el período (180 días). El enfriamiento lento consistió en almacenar a 10 °C por 10 días, 4 °C por 20 días y 0 °C por los restantes 150 días. Mensualmente se evaluaron índices de madurez y compuestos químicos, contenido antioxidante global (AO), α-farneseno (AF) y trienos conjugados (TC). La incidencia de escaldado superficial se determinó después de 180 días de almacenaje más 10 días a 20 °C. La aplicación de 1-MCP, en ambos sistemas de enfriamiento, logró mantener valores de firmeza de alrededor de 8,2 Kg. hasta el fin del almacenaje y disminuir la concentración de AF, TC y AO durante la guarda. La incidencia de escaldado en fruta con 1-MCP fue 0%, independiente del tipo de enfriamiento. Entre los tratamientos sin 1-MCP, el enfriamiento lento fue más efectivo en prevenir el desorden, presentando sólo 1,3% de incidencia, respecto a 75,6% del enfriamiento normal. Sin embargo, la firmeza cayó bajo los estándares para exportación desde los cuatro meses.

Palabras-clave
trienos conjugados, antioxidantes, α-farneseno, 1-metilciclopropeno, desorden fisiológico, etileno

 
 en Effect of the cooling system and 1-MCP on the incidence of superficial scald in 'Granny Smith' apples
Moggia, Claudia; Hernández, Omar; Pereira, Marcia; Lobos, Gustavo A. & Yuri, José Antonio

Abstract

A study was carried out to determine the effects of two cooling systems and the application of 1-methylcyclopropene (1-MCP, SmartFreshTM) on the incidence of superficial scald in apples ( Malus domestica check for this species in other resources Borkh.) cv. Granny Smith. Fruit were collected from a commercial orchard (Colbún, Maule Region , Chile) during 2004-2005 season. A completely randomized design was used in a 2 x 2 factorial arrangement, using cooling systems (normal and step-wise cooling) and application of 1-MCP (0 and 625 nL L-1 i.a.) as the main factors. Fruit from normal cooling were kept at 0 °C throughout the storage period (180 days). Step-wise cooling consisted of storing the fruit at 10 °C for 10 days; 4 °C for the next 20 days and 0 °C for the remaining 150 days. Every month, maturity indices and the chemicals, global antioxidant content (AO), α-farnesene (AF) and conjugated trienes (TC), were measured. Incidence of superficial scald was determined after 180 days of storage, plus 10 days at 20 °C. The application of 1-MCP with both cooling systems was capable of maintaining firmness values around 8,2 kg up to the end of the storage period, as well as decreasing the concentration of AF, TC and AO during storage. Incidence of superficial scald on fruit with 1-MCP was 0%, regardless of the type of cooling. Among treatments without 1-MCP, step-wise-cooling was more effective in preventing superficial scald, resulting in 1.3% incidence compared to 75.6% with the normal cooling system. Nevertheless, from the fourth month onwards firmness was lower than that required for export.

Keywords
conjugated trienes, antioxidants, α-farnesene, 1-methylcyclopropene, physiological disorder, ethylene

 
© Copyright 2009 Chilean Journal of Agricultural Research.
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