Used to artificially
end seed dormancy
Initiate seed
germination and end
seed dormancy.
Causes bolting in
adult plants, leading
to flower and seed
production
Both controlled by
the hormone auxin
Geotropism, aka
gravitropism
Phototropism
Used to promote
flowering
Response to
light
Control and coordination
Used to increase
fruit size
Response to
gravity
Control growth
and coordination
5.4 PLANT HORMONES
Gibberellins
Ethene
Controls cell
division and fruit
ripening
KEY
Used in rooting
powders to promote
root growth
(biology only)
Uses of plant hormones
Used to control
ripening. Fruit is ripened
after transport to
prevent spoiling
‘Higher tier only’
written in orange.
Auxins
Used as a weed killer makes weeds grow too
quickly, leading to plant
death
Can promote
growth of tissue
cultures
AQA
https://bit.ly/pmt-edu
https://bit.ly/pmt-cc
https://bit.ly/pmt-cc