OCR AS Xerophytic Adaptions

OCR AS Xerophytic Adaptions

1. Hairy Leaves - trap water vapour as a layer of moisture

2. Sunken Stomata - found in pits to trap water vapour

3. Rolled Leaves - presence of hinge cells which reduces the surface area exposed

4. High Solute Concentration in Cells - reduces water potential inside leaves

5. Thick, Waxy Cuticle - waterproof to reduce water loss, relatively impermeable

6. Small, Needle Leaves - reduces surface area

7. Fewer Stomata - reduces diffusion of water vapour

8. Stomata on Lower Surface - less exposure to sun, reduces diffusion

9. Densely Packed Spongy Mesophyll - smaller surface area for evaporation