Who proposed the 'cohesion theory of ascent of sap'?

Strasburger

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Godlewski

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Western

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Dixon and Jolly

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Solution

The correct option is D Dixon and Jolly
The cohesion theory of ascent of sap was given by Dixon and Jolly.
According to this theory ascent of sap occurs due to the transpiration pull generated by loss of water from stomata of leaves. The transpiration pull generates the tension and cohesion and adhesion forces are responsible for the formation of a continuous water column in the xylary elements.

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