Uses of plant hormones

Created by

Mee Chan

Cards (14)

State the 6 commercial uses of plant hormones  
Selective weed killers
Growing from cuttings with rooting powder
Controlling flower + fruit formation
Producing seedless fruit
Controlling ripening of fruits
Controlling seed germination
Why do famers use plant hormones  
Higher yield + Profit
Explain how using auxins for selective weed killers help 
Most weed in field crops =broad (might block sunlight)
SWK developed from auxins to ONLY affect broad leaved plants
Disrupt growth patterns
How does selective week killers kill the unwanted weeds  
By disrupting their growth pattern
What is a cutting  
Part of plant that's been cut off
How do cuttings help famers  
Adding cuttings in soil with rooting powder (contains auxin)
Produces roots rapidly + grows into new plants
Lots of clones of a desired plant made quickly
Why do cuttings need rooting powder  
They don't grow by themselves in soil
What are gibberellins  
Plant hormones that stimulate seed germination for stem growth + flowering
How are gibberellins useful
make plants flower sooner + in conditions they won't normally
reduce flower formation + improve quality
(eg) if tree has too many fruits, they'll fall of prematurely without fully ripening
How does gibberellins help grow SEEDLESS fruits
G is applied to un-pollinated flowers to make fruit grow but seeds won't grow as they haven't been actually pollinated
What is germination  
the process of seeds developing into new plants
How can you control seed germination
Seeds unable to germinate if kept in undesirable conditions
Treated with gibberellins to make them germinate any any time
And germinate at the same time
How does ethene help control ripening of fruits  
It's a ripening hormone added to fruits so they ripen on time
Explain how controlling the ripening of fruits using ethene help  
Fruit plucked unripe so they are less likely to be damaged during transport