Chapter 34 - Transport in Plants - 34.4 - Solutes Are Transported in the Phloem - 34.4 Recap - Learning Outcomes - Page 747: 2

Sap flows through phloem via bulk flow, or from an area with higher pressure potential to an area with lower pressure potential. This occurs from one sieve tube to the next. The moving of solutes to the sieve tubes is called loading. This creates higher pressure potential that drives the bulk flow to areas of unloading.

Sap flows through phloem via bulk flow, or from an area with higher pressure potential to an area with lower pressure potential. This occurs from one sieve tube to the next. The moving of solutes to the sieve tubes is called loading. This creates higher pressure potential that drives the bulk flow to areas of unloading.