Photosynthesis
- Created by: Sophie
- Created on: 15-09-14 14:59
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- Photosynthesis
- Using light energy to synthesize molecules
- Leaf Features
- Large SA= max. diffusion of CO2 and light
- Cuticle= Prevents H20 loss. Not on bottom as stomata present
- Stomata= Intake of CO2 and other gases
- Xylem= Transport of H20 and mineral salts from roots
- Phloem= Transport of products of photosynthesis away from leaf
- Sugars transported as sucrose
- Palisade cells are main tissue for photosynthesis
- Large air spaces in spongy mesophyll layer to alow fast diffusion of CO2/02 into palisade cells
- Chloroplasts
- Thylakoids= Light dependent reaction
- Stroma= light independent reaction
- Mg ion in centre of chlorpohyll
- Lack of Mg+ ions in soil reduces chlorophyll synthesis making plants yellow
- Spectra
- Action spectrum= amount of photosynthesis taking place at each wavelength
- Absorption spectrum= proportion of light at each wavelength absorbed by the plant
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