Controls and factors affecting transpiration
- Created by: elle1999
- Created on: 08-02-16 16:23
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- Controls an factors affecting transpiration
- Stomata
- Turgor driven process
- Environmental conditions preferable
- Solutes pumped in by active transport increasing turgor
- Light
- Light- stomata open for photosynthesis
- Intensity increases number of stomata so water vapour increases
- Relative humidity
- Very high reduces water vapour potential gradient between inside and outside of the leaf.
- Temperature
- Increases KE of water molecules and rate of evaporation from mesophyll cells into the air.
- Increases concentration of water vapour that the external air can hold before e it becomes saturated.
- Air movement
- Water vapour around stomata increases reducing the diffusion gradient and increasing the transpiration gradient.
- Soil water
- If dry transpiration will decrease.
- Stomata
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