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Mangues (Mangifera indica) : modifications phytochimiques liées à la maturation suite à une quarantaine thermique et l'entreposage à basse température.

Ripening associated phytochemical changes in mangos (Mangifera indica) following thermal quarantine and low-temperature storage.

Auteurs : TALCOTT S. T., MOORE J. P., LOUNDS-SINGLETON A. J., et al.

Type d'article : Article

Résumé

Fresh mangos entering the USA must be subjected to a thermal quarantine treatment to eliminate invasive pests, commonly followed by cold storage to extend shelf life. Changes in phytochemicals and their resultant antioxidant capacity after such treatments are unknown. These studies evaluated mature, green mangos subjected to a simulated quarantine treatment using hot water immersion at 50 °C for 60 min and subsequent storage at 5 and 20 °C against controls. Fruit held at 5 °C were transferred to 20 °C after 8 days of storage to complete ripening, whereby symptoms of chill injury were observed. Phytochemical, antioxidant capacity, and quality parameters were then assessed every 4 days as the fruit ripened over the next 20 days. Storage temperature during ripening, not the hot water treatment was the major factor contributing to changes in polyphenolic content, with antioxidant capacity unaffected by either postharvest treatments or ripening. Major polyphenolics identified were free gallic acid and 4 gallotannins that increased in concentration by 34% as the fruit ripened. Carotenoid concentrations were highest in hot water-treated fruit stored at 20 °C, whereas storage at 5 °C initially delayed ripening. Only minor differences in antioxidant phytochemicals were observed.

Détails

  • Titre original : Ripening associated phytochemical changes in mangos (Mangifera indica) following thermal quarantine and low-temperature storage.
  • Identifiant de la fiche : 2006-0836
  • Langues : Anglais
  • Source : Ital. J. Food Sci. - vol. 70 - n. 5
  • Date d'édition : 06/2005

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