Factors affecting transpiration
- Created by: Steff06
- Created on: 01-05-16 13:37
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- Factors affecting transpiration
- Number of leaves:
- More leaves = Larger SA = more vapour lost.
- Number/size/position of stomata:
- Many large stomata = more water vapour lost. If stomata are on lower surface = Transpiration less/slower.
- Presence of cuticle:
- Waxy cuticle present = less evaporation
- Light:
- In light, stomata open and allow gaseous exchange for photosynthesis.
- Temperature:
- Higher temp = Increased rate of water loss. Increases evaporation, increases diffusion and decreases water potential in air.
- Relative humidity:
- Higher humidity will decrease rate of water loss as there will be a smaller water vapour potential gradient between air spaces in leaf and air outside.
- Air movement/wind:
- Air moving outside leaf will carry away water vapour and maintain a high vapour potential gradient.
- Water availability:
- Little water in soil = plant cannot replace water lost. Water loss is reduced.
- Number of leaves:
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