BRAINCAKEPhloem Loading
Glucose is manufactured in the chloroplasts by photosynthesis.
This is converted to sucrose in the cytoplasm of the mesophyll cells.
1. Hydrogen ions are actively transported from the companion cells into the surrounding cell walls (apoplast) using ATP.
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Key terms in this lesson
- plasmodesmata
- Fine channels through plant cell walls that connect the cytoplasm of neighbouring cells, allowing transport and communication between them.
- co-transport
- The movement of one substance across a membrane linked to, and powered by, the movement of another substance down its concentration gradient.
More in Transport in Plants
- Measuring the Rate of Water Uptake
- Factors Affecting Transpiration
- Root Pressure
- Translocation in the Phloem
- The Symplast Pathway
- The Apoplast Pathway
- Phloem Unloading
- Mass Flow Hypothesis
All 21 lessons in Transport in Plants · All Edexcel AS-level Biology topics