ACTIVITY OF THE ENZYME POLYPHENOL OXIDASE AND SUSCEPTIBILITY TO DAMAGE FROM LATEX IN 'HADEN' AND 'TOMMY ATKINS' MANGOES
Damage from latex (DPL) represents a problem in Mexican mango, causing up to 10 % of annual losses. DPL begins when exuded latex touches the fruit's skin, producing a superficial darkness that diminishes mango quality and commercial value. Previous studies in mango suggest that terpens favor da...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2005 |
| País: | México |
| Institución: | Universidad Autónoma Metropolitana |
| Repositorio: | Redalyc-UAM |
| OAI Identifier: | oai:redalyc.org:60912502006 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=60912502006 |
| Access Level: | acceso abierto |
| Palabra clave: | Agrociencias post latex PPO exocarp PPO fruit quality harvest losses |
| Sumario: | Damage from latex (DPL) represents a problem in Mexican mango, causing up to 10 % of annual losses. DPL begins when exuded latex touches the fruit's skin, producing a superficial darkness that diminishes mango quality and commercial value. Previous studies in mango suggest that terpens favor damage from latex through the activation of polyphenoloxidases (PPO's). The objective of this study was to determine the correlation between damage from latex and the activity of total PPO's of the exocarp and latex in 'Haden' and 'Tommy Atkins' mangoes harvested in April, May, and June in Lázaro Cárdenas, Michoacán, México. Enzyme activity was measured with a spectrophotometer and susceptibility to DPL was evaluated as the percentage of damaged area. Activity of exocarp total PPO's was similar for 'Tommy Atkins' and 'Haden' during the first two harvest seasons, and it only increased for 'Tommy Atkins' in the last harvest season. Susceptibility to DPL showed contrasting performance between both cultivars. In 'Haden' it increased throughout the three seasons while it decreased in 'Tommy Atkins'. Therefore, total activity of exocarp PPO¿s and damage from latex do not explain susceptibility to DPL in Mexican mango. We suggest including the analysis of other components and latex enzymes in future experiments on susceptibility to DPL. |
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