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Altération des parois cellulaires lors de l'entreposage des carottes (Daucus carota L. cv. Nerac).

Changes in the carrot (Daucus carota L. cv. Nerac) cell wall during storage.

Auteurs : GALINDO F. G., BRATHEN E., KNUTSEN S. H., et al.

Type d'article : Article

Résumé

The aim of the study was to examine biochemical changes in cell wall carbohydrates and extension proteins during long-term storage of carrots. During the storage period of 6 months, cell wall fractions were isolated from the carrot at various times for carbohydrate and protein analysis. Signs of extension cross-linking and its concomitant insolubilisation in the cell wall were found after 7 and 12 weeks of storage. During the same period the concentration of galactose and arabinose decreased, while other carbohydrate components as well as the degree of methylesterification remained virtually unchanged. After the 12th week of storage no changes in the extension of carbohydrates were detected. Oxidative cross-linking between extension molecules in the cell wall has been implicated in cell wall strengthening and may be part of the mechanism behind the storage induced firmness of carrots.

Détails

  • Titre original : Changes in the carrot (Daucus carota L. cv. Nerac) cell wall during storage.
  • Identifiant de la fiche : 2005-0259
  • Langues : Anglais
  • Source : Food Res. int. - vol. 37 - n. 3
  • Date d'édition : 2004

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