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OCR AS Xerophytic Adaptions
- Hairy Leaves - trap water vapour as a layer of moisture
- Sunken Stomata - found in pits to trap water vapour
- Rolled Leaves - presence of hinge cells which reduces the surface area exposed
- High Solute Concentration in Cells - reduces water potential inside leaves
- Thick, Waxy Cuticle - waterproof to reduce water loss, relatively impermeable
- Small, Needle Leaves - reduces surface area
- Fewer Stomata - reduces diffusion of water vapour
- Stomata on Lower Surface - less exposure to sun, reduces diffusion
- Densely Packed Spongy Mesophyll - smaller surface area for evaporation
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