Who has used two bulbs of semipermeable membrane to explain pressure flow theory?

Munch

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Jones

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Spanner

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Fenson

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Solution

The correct option is C Munch
Munch (1930) explained pressure flow theory. He postulated the mass flow of organic solute takes place from the site of higher concentration to the site of lower concentration. According to it model, phloem sap moves from sugar sources to sugar sinks through turgor pressure, due to the high concentration of organic substances inside source cell. This result in movement of food from source to sink. Thus, the correct option is A.

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