Which of the following is the main point in d | vedclass

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(C) The Munch theory (Pressure Flow Hypothesis) suggests that translocation is a passive physical process driven by turgor pressure gradients. However

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Explanation of sugar transport is not given

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(C) The Munch theory (Pressure Flow Hypothesis) suggests that translocation is a passive physical process driven by turgor pressure gradients. However,a major criticism is that it fails to account for the active transport components. Specifically,Ziegler $(1956)$ pointed out that the movement of sugars from mesophyll cells into the sieve tubes often occurs against a concentration gradient,which requires metabolic energy and cannot be explained solely by physical diffusion.

Which of the following is the main point in disfavour of the Munch theory?

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