The Influence of Elevated CO on Volatile Emissions, Photosynthetic Characteristics, and Pigment Content in Plants Species and Varieties.

Climate change will determine a sharp increase in carbon dioxide in the following years. To study the influence of elevated carbon dioxide on plants, we grew 13 different species and varieties from the family at three carbon dioxide concentrations: 400, 800, and 1200 ppmv. The photosynthetic parameters (assimilation rate and stomatal conductance to water vapor) increase for all species. The emission of monoterpenes increases for plants grown at elevated carbon dioxide while the total polyphenols and flavonoids content decrease. The chlorophyll content is affected only for some species (such as ), while the β-carotene concentrations in the leaves were not affected by carbon dioxide.