Effects of season and postharvest storage on the carotenoid content of Solanum phureja potato tubers

D. Wynne Griffiths, M. Finlay B. Dale, Wayne L. Morris, Gavin Ramsay

    Research output: Contribution to journalArticle

    26 Citations (Scopus)

    Abstract

    The total carotenoid content was determined of tubers from 38 Solanum phureja lines grown in field plots over 3 years. The results indicated a significant difference between years, but the ranking was similar from year to year and the interaction between season and variety was small. Postharvest storage significantly reduced the carotenoid content of the tubers, and reducing the storage temperature further lowered the carotenoid content. Examination of the individual carotenoids revealed that lutein was the most stable and least likely to be reduced, while the levels of the carotenoids derived from beta-carotene were significantly reduced during storage at either temperature. Exposure of the tubers to either mercury or sodium lights resulted in a significant increase in total carotenoid content, concomitant with elevated chlorophyll. Although both types of radiation produced a broadly similar increase in total carotenoid contents, differential effects on the individual carotenoid profile of the light-induced carotenoids were observed.
    Original languageEnglish
    Pages (from-to)379-385
    Number of pages7
    JournalJournal of Agricultural and Food Chemistry
    Volume55
    Issue number2
    DOIs
    Publication statusPublished - 2007

    Keywords

    • Carotenoids
    • Food Preservation
    • Light
    • Plant Tubers
    • Seasons
    • Solanum

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