Cavitation and water fluxes driven by ice water potential in Juglans regia during freeze–thaw cycles

• Published in: Journal of experimental botany Vol. 67; no. 3; pp. 739 - 750
• Main Authors: Charra-Vaskou, Katline, Badel, Eric, Charrier, Guillaume, Ponomarenko, Alexandre, Bonhomme, Marc, Foucat, Loïc, Mayr, Stefan, Améglio, Thierry
• Format: Journal Article
• Language: English
• Published: England Oxford University Press 01.02.2016; Oxford University Press (OUP)
• Subjects: Freezing; Ice; Juglans - physiology; Life Sciences; Magnetic Resonance Spectroscopy; Plant Stems - anatomy & histology; Plant Stems - physiology; RESEARCH PAPER; Ultrasonics; Vegetal Biology; X-Ray Microtomography; winter biology; walnut tree; bark shrinkage; Juglans regia L; X-ray microtomography; microdendrometer; embolism; Acoustic emissions

Freeze–thaw cycles induce major hydraulic changes due to liquid-to-ice transition within tree stems. The very low water potential at the ice–liquid interface is crucial as it may cause lysis of living cells as well as water fluxes and embolism in sap conduits, which impacts whole tree–water relation...