B1g - Controlling Plant Growth Flashcards
1
Q
Describe shoots
A
Positively phototropic but negatively geotropic
2
Q
Describe roots
A
Negatively phototropic but positively geotropic
3
Q
What are auxins?
A
A group of plant hormones
4
Q
What do auxins do?
A
- move through the plant in solution
- are involved in the response to light (phototropism)
- are involved to the response to gravity (geotropism)
5
Q
Where are auxins made and what happens in response to light?
A
They are made in the top and they are unequally distributed in response to light
6
Q
What is phototropism?
A
Light
7
Q
What is geotropism?
A
Gravity
8
Q
What are the commercial uses of plant hormones?
A
- selective weedkillers
- rooting powder
- fruit ripening (delay or acceleration)
- control of dormancy
