Relay pump hypothesis was given by

Goldewski

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J.C. Bose

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Westermaier

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None of the above

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Solution

The correct option is A Goldewski
Godlewski proposed relay pump theory to explain the ascent of sap. According to him, there was a rhythmic change in the osmotic pressure of the living cells of xylem parenchyma and medullary rays, which brought about a pumping action of water in an upward direction.
Thus, the correct answer is option A.

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