The Druckstrom or mass-flow hypothesis for translocation of food matter in phloem was proposed by

Dickson and Jolly

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Ernst Munch

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Van Neil

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Both B and C

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Solution

The correct option is B Ernst Munch
The mass flow hypothesis is also called a pressure-flow hypothesis. It was given by Munch in the year 1930.
According to this theory, organic substances move in the sieve tubes from the region of high osmotic concentration to the region of low concentration in a mass flow due to the occurrence of pressure gradient.

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Similar questions

Q. Describe the mass flow hypothesis for translocation of organic solutes(food) in plants.

Q. Describe the mass flow hypothesis for translocation of organic solutes (food) in plants. What is the major criticism against this hypothesis?

Q. Assertion :Translocation of sugar from source (leaf) to sink is defined as pressure flow hypothesis. Reason: Translocation of the solute is facilitated through living phloem sieve tube cells.

In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion: Translocation of sugar from source (leaf) to sink is defined as pressure flow hypothesis
Reason: Translocation of the solute is facilitated through living phloem sieve tube cells.

Explain pressure flow hypothesis of translocation of sugars in plants.

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