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Mandarines de la variété `Fortune' récoltées à différents stades de maturité : teneur en glucides en fonction de la sensibilité au froid induite par la chaleur et du taux de respiration.

Carbohydrates as related to the heat-induced chilling tolerance and respiratory rate of `Fortune' mandarin fruit harvested at different maturity stages.

Auteurs : HOLLAND N., MENEZES H. C., LAFUENTE M. T.

Type d'article : Article

Résumé

The authors have evaluated the effect of a heat-conditioning treatment (3 days at 37 °C) on respiratory rate, soluble carbohydrate and starch content of `Fortune' mandarin fruit harvested at different maturity stages and stored at a chilling (2 °C) and a non-chilling (12 °C) temperature. The treatment was highly effective, increasing the tolerance of detached `Fortune' fruit to chilling injury (CI). Changes in carbohydrate levels in response to the high temperature treatment, and during exposure of the non-conditioned and heat-conditioned fruit to 2 and 12 °C, appear to be mainly related to the consumption of carbohydrate reserves for respiration. The highest respiratory rate was found in fruit exposed to 37 °C. The respiration of non-conditioned fruit stored at 2 °C was lower than that of control fruit stored at 12 °C. The experimental data suggest that sucrose but not glucose, fructose or starch could be involved in the heat-induced chilling tolerance of citrus fruit detached from the tree.

Détails

  • Titre original : Carbohydrates as related to the heat-induced chilling tolerance and respiratory rate of `Fortune' mandarin fruit harvested at different maturity stages.
  • Identifiant de la fiche : 2003-2379
  • Langues : Anglais
  • Source : Postharvest Biol. Technol. - vol. 25 - n. 2
  • Date d'édition : 06/2002

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