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Carbon dioxide-induced changes in color and anthocyanin synthesis of stored strawberry fruit.

Holcroft, D.M. and A.A., Kader

HortScience. Volume 34, Number 7, Dec 1999. Pages 1244-1248.

1999

บทคัดย่อ

Carbon dioxide-induced changes in color and anthocyanin synthesis of stored strawberry fruit.

Anthocyanin concentrations increased in both external and internal tissues of 'Selva' strawberries (Fragaria x ananassa Duch.) stored in air at 5 degrees C for 10 days, but the increase was lower in fruit stored in air enriched with 10 or 20 kPa CO(2). Flesh red color was less intense in CO(2) storage than in air storage. Activities of phenylalanine ammonia lyase (PAL) and UDP glucose : flavonoid glucosyltransferase (GT) decreased during storage, with decreases being greater in both external and internal tissues of strawberry fruit stored in air +20 kPa CO(2) than in those kept in air. Activities of both PAL and GT in external tissues of strawberries stored in air +10 kPa CO(2) were similar to those in fruit stored in air, while enzyme activities in internal tissues more closely resembled those from fruit stored in air + 20 kPa CO(2). Phenolic compounds increased during storage but were not affected by the storage atmosphere. The pH increased and titratable acidity decreased during storage; these effects were enhanced in internal tissues by the CO(2) treatments, and may in turn have influenced anthocyanin expression.