Changes in N and S leaf content, stomatal density and specific leaf area of 14 plant species during the last three centuries of CO(2) increase.

alnus glutinosa amaranthus caudatus azote azufre betula pendula biochemistry biochimie buxus carbon carbon dioxide carbone carbono ceratonia siliqua cynodon dactylon dioxyde de carbone espagne estoma feuille gentiana helleborus histoire historia history hojas juniperus communis leaf area leaves nitrogen papaver pinus pinea pinus uncinata pistacia lentiscus rhododendron soufre spain stomata stomate sulphur superficie foliar surface foliaire