Partager

Altérations des paramètres respiratoires et antioxydants des concombres (Cucumis sativus L.) entreposés dans des conditions de concentrations d'oxygène élevées et faibles.

Changes in respiratory and antioxidative parameters in cucumber fruit (Cucumis sativus L.) stored under high and low oxygen concentrations.

Auteurs : SRILAONG V., TATSUMI Y.

Type d'article : Article

Résumé

The effects of controlled atmospheres (CA) of 5, 21 (air, control) and 100% O2 on chilling injury, respiratory and antioxidative parameters of cucumber fruits stored at 5, 10 and 20 °C were studied. The appearance of chilling injury symptoms in cucumber was delayed in both CA treatments; 100% O2 reduced pitting more effectively than the 5% O2 treatment. Respiration and ethylene production rates were suppressed in cucumber fruits stored at 5 °C to a greater extent in 100% O2 than in 5% O2 and air. At 20 °C, however, 100% O2 increased respiration to rates higher than those observed under 5 and 21% O2. The respiration rate of cucumber fruits stored at 100% O2 at 10 °C was lower than that of the control but higher than that of fruits stored at 5% O2. Fruits were analyzed for changes in enzymatic antioxidant, i.e. superoxide dismutase (SOD) and catalase, and non-enzymatic antioxidant, i.e. ascorbic acid and glutathione. In fruits stored at 5 °C, the SOD activity temporarily increased at D-1 by 5 and 100% O2 treatments; at D-5, its activities under all storage atmospheres increased. Catalase activity in the control fruit was higher than that in fruits stored under 5 and 100% O2. Glutathione concentration changed slightly from the initial level at different storage conditions. The ascorbic acid content in all storage atmospheres decreased throughout the storage period.

Détails

  • Titre original : Changes in respiratory and antioxidative parameters in cucumber fruit (Cucumis sativus L.) stored under high and low oxygen concentrations.
  • Identifiant de la fiche : 2005-0821
  • Langues : Anglais
  • Source : J. jap. Soc. hortic. Sci. - vol. 72 - n. 6
  • Date d'édition : 2003

Liens


Voir la source

Indexation