The translocation of organic solutes in sieve | vedclass

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(B) The translocation of organic solutes (primarily sucrose) in the phloem is explained by the $Munch$ pressure-flow hypothesis or mass flow hypothesi

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By mass flow involving carriers and $ATP$

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(B) The translocation of organic solutes (primarily sucrose) in the phloem is explained by the $Munch$ pressure-flow hypothesis or mass flow hypothesis.According to this mechanism,glucose is prepared at the source (leaves) and converted into sucrose.Sucrose is then loaded into the sieve tube elements of the phloem using $ATP$ (active transport).This creates a high osmotic pressure in the phloem,causing water to enter from the adjacent xylem,which increases the turgor pressure.This pressure gradient drives the mass flow of sap from the source to the sink,where sucrose is unloaded and used or stored.

The translocation of organic solutes in sieve tubes occurs through which of the following mechanisms?

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