Resumo

GARCIA ESPEJEL, Fernando; SAUCEDO VELOZ, Crescenciano; SAUCEDO REYES, Daniela  e  CHAVEZ FRANCO, Sergio Humberto. Fruit quality of two mexican strawberry varieties and one introduced frigoconservated in high CO ₂. Rev. Mex. Cienc. Agríc [online]. 2017, vol.8, n.4, pp.747-757. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v8i4.3.

Recently in México, the Colegio de Postgraduados has generated strawberry varieties called “Jacona” and “Zamorana”. Due to its recent appearance, it is necessary to evaluate several factors, such as its postharvest behavior, which is useful for evaluation and quality conservation purposes, in relation to commercial varieties currently in use. The objective was to evaluate the physiological changes related to the senescence process of strawberry fruits stored in refrigeration and high concentrations of CO2. In order to do this, fruits were harvested at commercial maturity, then stored for 8 days with and without controlled atmosphere (15% CO2), there were 6 treatments as a result of the combination of variety factor (Festival, Jacona and Zamorana) and CO2 concentration (0.03 and 15%) in the atmosphere. After the cooling period, the variables determined were: pulp firmness (N), weight loss (%), external color (luminosity, saturation index or chroma and pitch angle), vitamin C, total soluble solids, pH, titratable acidity and ethanol and acetaldehyde concentration. A completely randomized design with factorial arrangement was applied and a mean comparison with Tukey’s tests (α= 0.05) was used to detect significant differences. The results showed that after exposing the fruits to an atmosphere with 0.03 or 15% CO2 for 8 days at 2 ±1 °C, the three varieties showed similar behavior in terms of weight loss, firmness, luminosity, tone angle, saturation index and total soluble solids. An atmosphere with 15% of CO2 maintained the vitamin C concentration in Mexican varieties during storage but it decreased in ‘Festival’, and caused an increase in the concentration of ethanol and acetaldehyde in the three studied varieties.

Palavras-chave : Fragaria x annanasa Duch.; anaerobic metabolites; total soluble solids; vitamin C.

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