PLANT TROPISM NOTES
Tropism is
positive or negative
. They can be
-Positive Tropism- Negative Tropism**Remember a stimulus is a
.
Plants sense and respond to change! How??

Seasonal Responses- plants living in regions that get cold can detect changes in the season and adapt to them. Example:



Short- day plants: plants that grow better when the night is longer than the day (example:
Long-day plants: plants that grow better when the night is shorter than the day (example:
Can humans manipulate plants to grow differently?
If so, how?
)
)
Phototropism
“Photo” means ______________
Gravitropism
“Gravi” means ______________
Thigmotropism
“Thigmo” stands for ________
Hydrotropism
“Hydro” means _____________
Definition:
Definition:
Definition:
Definition:
Movie
Tropism
1. “Sunflower
Phototropism”
2. “Cool Corn
Phototropism”
3. “Morning Glory
Thigmotropism
Twining”
4. “Sensitive Plant”
Thigmotropism
5. “Venus Flytrap”
Thigmotropism
Stimulus
Plant Response
Illustration
6. “Corn root
gravitropism”
7. “Sunflower
gravitropism”
8. “Coleus shoot
gravitropism”
Why do plants respond to different stimuli in their environments?
Do all parts of a
plant respond the same way to a stimulus? Why?
PLANT TROPISM NOTES
Name:
Date:
Block:
Tropisms is growth of a plant toward or away from a stimulus. They can be positive or negative.
-Positive Tropism-the growth of a plant TOWARD the stimulus
- Negative Tropism- the growth of a plant AWAY from the stimulus
**Remember a stimulus is anything that causes change.
Plants sense and respond to change! How??




Seasonal Responses- plants living in regions that get cold can detect changes in the season and adapt to them. Example: Trees leaves turning red and
orange because they allow their cholorplast to die off.
Short- day plants: plants that grow better when the night is longer than the day (example:tulips)
Long-day plants: plants that grow better when the night is shorter than the day (example:sunflowers, magnolia)
Can humans manipulate plants to grow differently? YES If so, how? They can expose the plant to more or less light and trick the plant into believing it is
experiencing a different day length.
Phototropism
“Photo” means Photo
Gravitropism
“Gravi” means gravity
Thigmotropism
“Thigmo” stands for _touch
Hydrotropism
“Hydro” means water
Definition: The growth of a plant
in response to light
Definition: The growth of a plant
in response to gravity
Definition: The growth of a plant
in response to touch or heat.
Definition: The growth of a plant
in response to water.