Explain the mass flow hypothesis of transport in the phloem.

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Mass flow hypothesis is regarded as the pressure-flow hypothesis and is the movement of food along the phloem. The concentration of glucose causes the osmosis gradient to form, and the movement of water is facilitated to the phloem through the xylem to maintain the concentration.

The turgor pressure causes the phloem sap to transport sugar to the sink from the source, and the pressure which plays a key role here is the flow hypothesis. The substance is moved in bulk and is known as the mass flow hypothesis.

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