B1g-controlling Plant Growth Flashcards
What is negatively phototropic?
Grow away from the light
What is positively geotropic?
Grow towards gravity
What is negatively geotropic?
Grow away from gravity
What is auxin?
Group of plant hormones
What are shoots?
Positively phototropic
Negatively geotropic
What are roots?
Negatively phototropic
Positively geotropic
What is positively phototropic?
Grow towards the light
What does auxin do?
Control growth at the tips of shoots and roots
Move through plant in solution
Involved in response to light
Involved in response to gravity
Where is auxin produced?
In the tip of the plant
How does auxin cause cell elongation?
Auxin builds up on shaded side of root
Auxin inhibits growth on shady side
Cells on top elongate faster
Roots bend down
What are some commercial uses for plant hormones?
Selective weedkillers
Rooting powder
Fruit ripening(delay or acceleration)
Controlling dormancy
What do selective weedkillers do?
Kill certain plants
What does rooting powder do?
Make cuttings produce roots rapidly and start growing as new plants
What is controlling dormancy?
Makes seeds germinate to make sure all seeds in a batch germinate at the same time
