When maple trees are tapped in the spring there are no leaves to promote transpiration.What process and pressure still allows the upward movement of sap so maple syrup can be collected.

Question

Quizplus · Accepted Answer

In the absence of transpiration, the upward movement of sap in the xylem vessels is driven by root pressure and osmosis. Root pressure pushes the sap upwards from the roots and osmosis helps in maintaining the water potential gradient between the roots and the top of the tree. This combination of pressure and osmosis allows the sap to move upwards and be collected as maple syrup.

When Maple Trees Are Tapped in the Spring There Are