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(D) The most widely accepted theory for the ascent of sap is the $Transpiration$ $Cohesion-Tension$ theory,proposed by $Dixon$ and $Joly$ in $1894$. A

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Transpiration cohesion theory of Dixon

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(D) The most widely accepted theory for the ascent of sap is the $Transpiration$ $Cohesion-Tension$ theory,proposed by $Dixon$ and $Joly$ in $1894$. According to this theory,the ascent of sap is driven by the transpiration pull generated at the leaf surface due to the evaporation of water. This pull is transmitted down the water column in the $Xylem$ due to the cohesive and adhesive properties of water molecules,which prevent the column from breaking under tension.

The most widely accepted explanation for the ascent of sap in trees is:

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