Root and shoot growth, assimilate partitioning and cell proliferation in roots of Sitka spruce (Picea sitchensis) grown in filtered and unfiltered chambers

air pollution arbre forestier biomasa biomass biomasse carbohidratos carbohydrates cell division chemical composition composition chimique crecimiento croissance dioxyde de soufre division cellulaire forest trees glucide growth nitrogen oxides oxyde d'azote ozone ozono photosynthese photosynthesis picea sitchensis propagation materials racine reino unido roots stecklings stems sulphur dioxide tallo tige united kingdom