Flavonoid responses in wheat grown at elevated CO<inf>2</inf>: Green versus senescent leaves

J. Peñuelas, M. Estiarte, B. A. Kimball

    Research output: Contribution to journalArticleResearchpeer-review

    14 Citations (Scopus)

    Abstract

    We compared flavonoids in green, mature, and senescing flag leaves of wheat grown under ambient (AC - 370 μmol mol-1) and elevated (EC - 550 μmol mol-1) concentrations of CO2 in a FACE (Free Air CO2 Enrichment) system. The concentrations of flag leaf flavonoids (e.g., isoorientin and tricin) decreased to one third in mature leaves, and the majoritary isoorientin almost disappeared in senescing leaves. Flavonoid concentrations increased in green well-developed flag leaves under EC (46% isoorientin and 55% tricin), whereas the differences disappeared in mature and senescing flag leaves. Predictions of changes in litter phenolic concentrations and their effects on decomposition rates under EC based on changes in green leaves need to be revised.
    Original languageEnglish
    Pages (from-to)615-619
    JournalPhotosynthetica
    Volume37
    Issue number4
    DOIs
    Publication statusPublished - 1 Dec 2000

    Keywords

    • Carbon based secondary compounds (CBSC)
    • Isoorientin
    • Leaf age
    • Litter
    • Phenolics
    • Tricin
    • Triticum aestivum

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