Y. Vázquez-López, R. Iribe-Salazar, M. Carrazco-Escalante, Soila Gaxiola-Camacho, J. Caro-Corrales
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引用次数: 2
Abstract
Modified atmosphere packaging and refrigeration of fruits and vegetables are used to extend their shelf life. The objective of this research was to evaluate quality variables in avocado (Persea americana Mill.) cv. "Hass" during storage in modified atmosphere packaging (MAP) at 8 °C and contrast them to those obtained during storage at room temperature (RT) and refrigeration (REF). Fruits at physiological maturity were stored in MAP bags with a thickness of 0.20 mm. A completely randomized design was used; factors were: type of storage (RT 21 °C, REF 8 °C, and MAP 8 °C), storage time (8, 16, 24, and 32 days), and ripening time after storage (2, 4, and 6 days). Quality variables were firmness (penetration force), total color difference (ΔE) in exocarp and mesocarp (colorimeter), pH (potentiometry), and total soluble solids (TSS, refractometry). Avocados stored in MAP maintained (p > 0.05) firmness, which was higher compared to REF and RT during the storage period. Firmness retention for avocados at RT, REF, and MAP, at day 16, was 5.7, 32.6, and 87.2%, and at day 32, it was 0 (no reading), 9.5, and 78.2%, respectively. Total color difference in exocarp and mesocarp, pH, and TSS ranged from 3.8 to 25.6, 3.2 to 20.3, 6.7 to 7.1, and 5.3 to 7.7 °Brix, respectively. During the storage period, fruits stored at MAP showed a firmness, ΔEexocarp, and ΔEmesocarp similar to those of fresh fruit. Type of storage showed no effect on pH and TSS during the storage period. The package for modified atmosphere at 8 °C allows to prolong the shelf life of “Hass” avocado for a period twice as long as that at room temperature, based on the fact that changes in firmness and color are reduced, properties that are important quality benchmarks.
期刊介绍:
AGROCIENCIA is a scientific journal created and sponsored by the Colegio de Postgraduados. Its main objective is the publication and diffusion of agricultural, animal and forestry sciences research results from mexican and foreign scientists. All contributions are peer reviewed. Starting in the year 2000, AGROCIENCIA became a bimonthly and fully bilingual journal (Spanish and English versions in the same issue). Since 2007 appears every month and a half (eight issues per year). In addition to the printed issues, the full content is available in electronic format.