Responses in plants Flashcards
What is a tropism?
Response of a plant to a directional stimulus
How do plants respond to stimuli?
Regulate their growth
What is a positive tropism?
Growth towards the stimulus
What is a negative tropism?
A growth away from the stimulus
What is a phototropism?
The growth of a plant in response to light
What do shoots do in response to light?
Grow towards the light
Positively phototropic
What do roots do in response to light?
Grow away from the light
Negatively phototropic
What is a gravitropism?
The growth of a plant in response to gravity
What do shoots do in response to gravity?
Grow upwards
Negatively gravitropic
What do roots do in response to gravity?
Grow downwards
Positively gravitropic
What are growth factors?
Hormone-like chemicals that speed up or slow down plant growth
Where are plant growth factors produced?
In the growing regions of the plant, shoots and roots
Where do growth factors go?
They move from the growth regions to the other parts of the plant where they’re needed
What are auxins?
A type of growth factor
Where are auxins produced?
In the tips of shoots
