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Photochemical response to summer drought in Quercus ilex trees growing in a naturally CO2 enriched site

TitlePhotochemical response to summer drought in Quercus ilex trees growing in a naturally CO2 enriched site
Publication TypeConference Paper
Year of Publication1998
AuthorsFARIA, T., Cerasoli S., García-Plazaola J. I., Guimaraes M. P., Abadia A., Raschi A., Miglietta F., Pereira J. S., & Chaves M. M.
EditorMohren, GMJ. and Kramer
Conference NameIMPACTS OF GLOBAL CHANGE ON TREE PHYSIOLOGY AND FOREST ECOSYSTEMS
Date Published1998///
PublisherSPRINGER
ISBN Number0-7923-4921-0
KeywordsElevated CO2, fluorescence, water stress, xanthophylls
Abstract

The effect of the interaction between water stress and growth at elevated CO2 on the leaf photochemistry were studied in Quercus ilex trees, growing in a naturally CO2 enriched site (the Bossoleto, Italy). Those plants were compared with plants growing nearby in similar soils but at ambient CO2 concentration. Our data indicate that down-regulation of photosynthesis is lower in non-watered trees from the enriched site than in non-watered trees from the ambient-CO2 site This may be associated to the higher carbon availability for the consumption of the excess absorbed light energy or to an increased protection of the photochemical apparatus against oxidative stress in plants grown under elevated CO2.