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Write down the objections related to Mun...

Write down the objections related to Munch mass flow hypothesis.

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i. Munchi Mass Flow hypothesis explains the unidirectional movement of solute only. However, bidirectional movement of solute is commonly observed in plants.
ii. Osmotic pressure of mesophyll cells and that of root hair do not confirm the requirements.
iii. This theory gives passive role to sieve tube and protoplasm, while some workers demonstrated the involvement of ATP.
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