Carbon isotope discrimination and stomatal responses of mature Pinus sylvestris L., trees exposed in situ for three years to elevated CO2 and temperature | [Composition isotopique du carbone et reponses stomatales de Pinus sylvestris matures exposes in situ pendant 3 ans a des elevations de CO2 et de temperature]

absorption d'eau carbon carbon dioxide carbone carbono changement climatique climatic change dioxyde de carbone environmental temperature estoma isotope isotopes photosynthese photosynthesis pinus sylvestris plant water relations relaciones planta agua relation plante eau stomata stomate temperatura ambiental water uptake