Root hair to xylem
- Created by: Molly Webb
- Created on: 09-04-15 16:13
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- Root hair to Xylem
- After being taken up by root hair cells it travels across the cortex
- Water potential inside the xylem vessels is lower than root hair cells, therefore moves passively down the gradient to the xylem through the cortex
- Route 1`
- Apoplast pathway
- water soaks into the cell walls
- travels across from cell wall to cell wall
- Doesn't enter cell
- travels across from cell wall to cell wall
- water soaks into the cell walls
- Apoplast pathway
- Root 2
- Symplast pathway
- enters the cell
- moves from cell to cell by osmosis
- or through strands of cytoplasm that make direct connections with adjacent cells
- These are called plasmodesmata
- enters the cell
- Symplast pathway
- Route 1`
- Cortex is surrounded by cell walls of many layers of cellulose fibres.
- Water potential inside the xylem vessels is lower than root hair cells, therefore moves passively down the gradient to the xylem through the cortex
- After being taken up by root hair cells it travels across the cortex
- Water reaches the STEELE
- Blocks the apoplast pathway
- As the outer layer endodermis contain a thick, waxy substance called suberin
- Blocks the apoplast pathway
- This band of suberin is called the Casparian *****.
- forming an impenetrable barrier to water in the walls on endodermis.
- The only way to travel through is via the cytoplasm of the cells.
- forming an impenetrable barrier to water in the walls on endodermis.
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