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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 71, No. 3, 2011, pp. 445-451
Bioline Code: cj11056
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 71, No. 3, 2011, pp. 445-451

 en POSTHARVEST SENSORY AND PHENOLIC CHARACTERIZATION OF 'ELEGANT LADY' AND 'CARSON' PEACHES
Infante, Rodrigo; Contador, Loreto; Rubio, Pía; Aros, Danilo & Peña-Neira, Álvaro

Abstract

High quality fruits are increasingly demanded along with the need to ensure this attribute to consumers. Thus, this study was aimed at characterizing a melting ('Elegant Lady') and a non-melting flesh ('Carson') peach ( Prunus persica check for this species in other resources (L.) Batsch) varieties by considering both their bioactive compound contribution and their sensory quality in ripe fruit at harvest and after a prolonged period of cold storage. Cultivars were evaluated at harvest (F0) and after 30 d of cold storage (F30), as well as after a maturation period at 20 °C for both F0 and F30 (R0 and R30, respectively). Fruit weight, flesh firmness, soluble solid content (SSC), titratable acidity (TA), and background color (Hue) were recorded at each stage. Furthermore, total phenol content was measured and a phenolic characterization by HPLC (High-Performance Liquid Chromatography) was performed for both varieties to detect the major low molecular weight phenolic compounds present in the fruit. Finally, a trained panel assessed the main sensorial parameters at R0 and R30. Total phenol content did not change significantly as a result of cold storage and differences were probably attributed only to genotype. Low molecular weight phenolic compounds were detected in 'Elegant Lady' and 'Carson', 15 and 12, respectively; (+)-catechin was the major compound found in both cultivars, but in higher concentrations in 'Elegant Lady'. In the phenolic characterization, 'Elegant Lady' was observed more closely than 'Carson' for flavonoids. After 30 d of cold storage, 'Elegant Lady' was unacceptable for consumption due to the appearance of physiological disorders such as wooliness while 'Carson' showed a mean score within the acceptability range.

Keywords
Quality parameters, sensory evaluation, total phenols, (+)-catechin, HPLC

 
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