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Aerobic-Anaerobic Metabolic Transition in Hass Avocado FruitsDepartamento de Ingeniería Agroindustrial, Universidad Autónoma Chapingo (UACh), Mexico-Texcoco km 38.5, Chapingo, 56230, Mexico, Mexico, Programa de Fisiología Vegetal, Instituto de Recursos Genéticos y Productividad, Colegio de Postgraduados, Mexico-Texcoco km 36.5, Montecillos, 56230, Mexico, Mexico, svalle{at}chapingo.mx
Programa de Fisiología Vegetal, Instituto de Recursos Genéticos y Productividad, Colegio de Postgraduados, Mexico-Texcoco km 36.5, Montecillos, 56230, Mexico, Mexico
Programa de Fisiología Vegetal, Instituto de Recursos Genéticos y Productividad, Colegio de Postgraduados, Mexico-Texcoco km 36.5, Montecillos, 56230, Mexico, Mexico
Departamento de Ingeniería Agroindustrial, Universidad Autónoma Chapingo (UACh), Mexico-Texcoco km 38.5, Chapingo, 56230, Mexico, Mexico
Programa de Fisiología Vegetal, Instituto de Recursos Genéticos y Productividad, Colegio de Postgraduados, Mexico-Texcoco km 36.5, Montecillos, 56230, Mexico, Mexico The aim of this work was to determine the anaerobic compensation point (ACP) in Hass avocado fruits as a function of temperature and the advance in ripening. Controlled atmosphere treatments with oxygen in a range from 0 to 4%, with two temperature levels, 5.5 and 20°C, applied to fruits of three firmness levels which included the pre-climacteric, the mid-zone of the climacteric rise and the post-climacteric phase. Mean ACP values of 1.44% and 1.81% were found for 5.5°C and 20°C, respectively. These values increased with ripening. The production of fermentative metabolites was not exclusive of O2 concentrations below to ACP, and temperature affected the accumulation of these compounds, with values of 10.7 mol/100mL at 5.5°C and 101.3 mol/100mL at 20°C. The production of those metabolites significantly increased with ripening and the values were, in the post-climacteric stage, 20 and 39 times greater than in the pre-climacteric one, at 5.5°C and 20°C, respectively. Results obtained here could be used to define adequate storage conditions for Hass avocado fruits in modified atmosphere systems.
Key Words: Persea americana Mill. avocado post-harvest ripening storage
Food Science and Technology International, Vol. 10, No. 6,
391-398 (2004) |
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