Stable Isotope Composition of Organic Compounds Transported in the Phloem of European Beech - Evaluation of Different Methods of Phloem Sap Collection and Assessment of Gradients in Carbon Isotope Composition during Leaf-to-Stem Transport

Stable Isotope Composition of Organic Compounds Transported in the Phloem of European Beech - Evaluation of Different Methods of Phloem Sap Collection and Assessment of Gradients in Carbon Isotope Composition during Leaf-to-Stem Transport