Pressure-Flow (Munch) Demonstrator
Flow runs from whichever chamber has higher turgor pressure — not always source-to-sink in the textbook direction.
Chamber A (leaf)
Chamber B (root)
Chamber A sucrose loading
70%
Chamber B sucrose loading
10%
Chamber A turgor:
70%
| Chamber B turgor:
10%
Chamber A has higher turgor — bulk flow runs A to B (the usual leaf-source, root-sink direction).