marram grass
- Created by: student102
- Created on: 26-05-19 21:02
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- Marram grass
- Shallow roots
- allows marram grass to absorb as much water as possible when it rains
- Long roots
- enables plant to reach water that is deep underground
- Thick waxy cuticle
- Reflects sunlight so it does not evaporate water, and makes leaf waterproof
- Lower epidermis is covered in hair
- reduces air movement so that water vapour is retained close to lower epidermis
- Leaves contain lignified cell walls
- Helps provide plant support when turgidity is lost
- Curled leaf
- reduces surface area exposed to wind, to reduce transpiration
- Also allows a microclimate of warm humid air to build to reduce water vapour potential gradient between leaf and outer air, to reduce water loss from stomata
- Rolled so upper epidermis is on the outside so fewer stomata are exposed to sun
- When there is a water shortage the leaf curls tighter to reduce transpiration
- Low density of stomata
- Fewer stomata means less water is lost
- Stomata are sunken in pits
- Makes them less likely to lose water
- When there is a shortage in water, more stomata close to reduce transpiration
- Leaves contain lignin
- This provides strength when turgidity is lost, to keep leaf upright when water is lost
- Shallow roots
- Curled leaf
- reduces surface area exposed to wind, to reduce transpiration
- Also allows a microclimate of warm humid air to build to reduce water vapour potential gradient between leaf and outer air, to reduce water loss from stomata
- Rolled so upper epidermis is on the outside so fewer stomata are exposed to sun
- When there is a water shortage the leaf curls tighter to reduce transpiration
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