Plant adaption for photosynthesis 

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  • Created by: katie
  • Created on: 24-03-13 12:11
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  • Plant adaption for photosynthesis
    • Leaves are flat and have large surface area to absorb maximum light and CO2
    • Leaves can grow towards/ orientate with the sun to expose maximum area. 
    • Leaves thin to allow light to penetrate to lower layers 
    • Cuticle and epidermis are transparent to allow light to penetrate to mesophyll 
    • Palisade cells elongated to reduce number of cross walls to absorb light 
    • Palisade cells packed with chloroplasts to increase photosynthetic capacity/light absorption 
    • Chloroplasts can move/circulate inside cells to gain best positions for absorbing light 
    • Spongy mesophyll cells are moist and have large surface area for absorption of gases 
    • Xylem to supply water and phloem to remove sugar 
    • Leaves thin to reduce distance for diffusion 
    • Air spaces in spongy mesophyll allow circulation of gases cut down distance for diffusion into cells
    • Stomatal pores permit entry and exit of gases. Intercellular spaces in spongy mesophyll allow gas exchange between outside and inside leaf 
    • Waxy cuticle on upper surface reduces water loss by evaporation - waterproofs the leaf 
    • Stomatal pores in lower epidermis reduce water loss by evaporation
    • Guard cells can close stomatal pores/control opening to reduce water loss 

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