Plasma membrane aquaporins are involved in winter embolism recovery in walnut tree1 From: Plant Physiology | Date: October 1, 2003| Author: | Copyright American Society of Plant Physiologists Oct 2003. Provided by ProQuest LLC.Copyright information

In perennial plants, freeze-thaw cycles during the winter months can induce the formation of air bubbles in xylem vessels, leading to changes in their hydraulic conductivity. Refilling of embolized xylem vessels requires an osmotic force that is created by the accumulation of soluble sugars in the vessels. Low water potential leads to water movement from the parenchyma cells into the xylem vessels. The water flux gives rise to a positive pressure essential for the recovery of xylem hydraulic conductivity. We investigated the possible role of plasma membrane aquaporins in winter embolism ...

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