info:ar-repo/semantics/artículo
Metabolic profiling and quality assessment during the postharvest of two tangor varieties subjected to heat treatments
Fecha
2018Autor
Moreno, Alejandra Soledad
Perotti, Valeria Elisa
Margarit, Ezequiel
Bello, Fernando
Vazquez, Daniel Eduardo
Podesta, Florencio Esteban
Tripodi, Karina Eva Josefina
Resumen
Citrus growth and export are one of the most important agroeconomical activities in regions with
Mediterranean-like climates. Among them, tangors in particular are appreciated by their sweet taste and delicate
palatability. The current study describes the analysis of the metabolome of two tangor (Citrus reticulata×C.
sinensis) cultivars, Murcott and Ellendale, broadly cultivated in Argentina and other countries, after heat
treatment and postharvest storage. This investigation intended to shed light on the biochemistry behind some
observed differences in the fruit of both cultivars, such as a distinctive response to cold storage. The differential
response to heat treatments and their effectiveness for preventing fungal infection was also evaluated.
Metabolite profiling carried out using several chromatographic techniques and differential methods allowed to
comprehensively compare the levels of sugars, organic acids, amino acids, polyalcohols, phenylpropanoids and
phospholipids among varieties. It was found that Ellendale possess lower content of turanose and melibiose,
higher levels of putrescine, unsaturated fatty acids, ribonic and propionic acids, as well as a remarkably higher
level of hesperidin than Murcott. After heat treatment, Ellendale was less prone to pathogen development during
storage than Murcott. The results, analyzed in terms of the differential metabolome response between the two
varieties, hint at a better competence, boosted by heat treatment, of Ellendale to withstand biotic and abiotic
stress conditions.