Which of the following is not correct mass flow hypothesis

Options

A. As the hydrostatic pressure in the phloem sieve tube increases pressure flow stops and sap is accumulated in phloem
B. The sugar is moved bidirectionally
C. The sugar which is transported is sucrose
D. Loading of the phloem sets up a water potential gradient that facilitates the mass movement in the phloem

Answer

A

Explanation

The mass flow or pressure flow theory was proposed by munch. According to this the movement of protoplasm along a turgor pressure gradient induced by a maintained gradient of water potential.