plant hormones
- Created by: Muskaan Dhaliwal
- Created on: 08-08-19 18:22
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- plant hormones
- plants produce hormones to co-ordinate and control growth
- phototropism (light)
- light breaks down auxins and they become unequally distributed in the shoot
- the side with the highest concentration of auxins has the highest growth rate and the shoot grows toward the light
- geotropism or gravitropism (gravity)
- gravity causes an unequal distribution of auxins
- in the roots the side with the lowest concentration has the highest growth rate and the root grows in the direction of gravity
- In new shoots from a seedling the unequal distribution of auxins causes the shoot to grow away from the gravity
- gibberellins
- important in initiating seed germination
- ethene
- controls cell division and ripening of fruits
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