Unenriched xylem water contribution during cellulose synthesis influenced by atmospheric demand governs the intra‐annual tree‐ring δ18O signature

• Published in: The New phytologist Vol. 240; no. 5; pp. 1743 - 1757
• Main Authors: Elisabet Martínez‐Sancho, Cernusak, Lucas A, Fonti, Patrick, Gregori, Alessandro, Ullrich, Bastian, Elisabeth Graf Pannatier, Gessler, Arthur, Lehmann, Marco M, Saurer, Matthias, Treydte, Kerstin
• Format: Journal Article
• Language: English
• Published: Lancaster Wiley Subscription Services, Inc 01.12.2023
• Subjects: Annual; Cellulose; Fractionation; Isotope composition; Isotope fractionation; Mathematical models; Moisture content; Oxygen isotopes; Physiological responses; Pine needles; Soil water; Trees; Water; Water availability; Xylem

The oxygen isotope composition (δ18O) of tree‐ring cellulose is used to evaluate tree physiological responses to climate, but their interpretation is still limited due to the complexity of the isotope fractionation pathways.We assessed the relative contribution of seasonal needle and xylem water δ18...