AQA GCSE Biology Unit 1 2.3 Plant control
- Created by: revisieacocobean
- Created on: 14-05-16 16:27
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- Control in plants
- Auxin- growth hormone
- promotes growth in the shoot
- Inhibits gowth in shoot
- Phototropism
- Light shines on shoot- more auxin accumulates on the shaded side- unequal distribution
- greater auxin percentage on shaded side
- Shaded side grows faster
- Plant bends towards light
- Shaded side grows faster
- Auxin breaks down in light
- greater auxin percentage on shaded side
- Light shines on shoot- more auxin accumulates on the shaded side- unequal distribution
- Geotropism/ gravitropism
- Gravity causes uneven distribution of auxin
- Underside of the root grows slower than the upper side making the root pint forwards
- Gravity causes uneven distribution of auxin
- Agriculture
- Cutting is dipped in rooting powder then put into compost to produce identical plants
- Auxin- growth hormone
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