CHAPTER NINE
PLANT RESPONSES TO THE
ENVIRONMENT
BASICS
Hormone: organic substance produced in small amounts. Controls growth and
development.
HORMONES
AUXINS
* Auxin has 5 letters, so there are 5 things that you need to remember:
1. Auxins bring about a bending reaction due to tropisms
2. They promote cell division
3. They are responsible for cell enlargement
4. They are responsible for apical dominance
5. They promote root development
GIBBERELLINS
* Change the b’s to p’s to form the word Gipper
PLANT RESPONSES TO THE
ENVIRONMENT
BASICS
Hormone: organic substance produced in small amounts. Controls growth and
development.
HORMONES
AUXINS
* Auxin has 5 letters, so there are 5 things that you need to remember:
1. Auxins bring about a bending reaction due to tropisms
2. They promote cell division
3. They are responsible for cell enlargement
4. They are responsible for apical dominance
5. They promote root development
GIBBERELLINS
* Change the b’s to p’s to form the word Gipper
