Presentation is loading. Please wait.

Presentation is loading. Please wait.

Tropism We will: Describe the effects of external stimuli on plant growth and development You will: Identify the types of tropisms exhibited by plants.

Published byIda Sandra Dalgaard Modified over 5 years ago

Similar presentations

Presentation on theme: "Tropism We will: Describe the effects of external stimuli on plant growth and development You will: Identify the types of tropisms exhibited by plants."— Presentation transcript:

1 Tropism We will: Describe the effects of external stimuli on plant growth and development You will: Identify the types of tropisms exhibited by plants

2 Definition Tropisms occur when plants respond to external stimuli. Tropisms are movements caused by a change in the plant’s growth pattern. Tropism comes from the Greek word meaning “turning”

3 Vocabulary -tropism turning Photo- phototropism Graviti- gravitropism
Word Meaning -tropism turning Photo- phototropism Graviti- gravitropism Thigmo Thigmotropism Hydro- hydrotropism

4 -tropism turning Photo- phototropism light Graviti- gravitropism
Word Meaning -tropism turning Photo- phototropism light Graviti- gravitropism Thigmo Thigmotropism Hydro- hydrotropism

5 -tropism turning Photo- phototropism light Graviti- gravitropism
Word Meaning -tropism turning Photo- phototropism light -turning due to light Graviti- gravitropism Thigmo Thigmotropism Hydro- hydrotropism

6 -tropism turning Photo- phototropism light Graviti- gravitropism
Word Meaning -tropism turning Photo- phototropism light -turning due to light Graviti- gravitropism Gravity Thigmo Thigmotropism Hydro- hydrotropism

7 -turning due to gravity
Word Meaning -tropism turning Photo- phototropism light -turning due to light Graviti- gravitropism Gravity -turning due to gravity Thigmo Thigmotropism Hydro- hydrotropism

8 -turning due to gravity
Word Meaning -tropism turning Photo- phototropism light -turning due to light Graviti- gravitropism Gravity -turning due to gravity Thigmo Thigmotropism Touch Hydro- hydrotropism

9 -turning due to gravity
Word Meaning -tropism turning Photo- phototropism light -turning due to light Graviti- gravitropism Gravity -turning due to gravity Thigmo Thigmotropism Touch -turning due to touch Hydro- hydrotropism

10 -turning due to gravity
Word Meaning -tropism turning Photo- phototropism light -turning due to light Graviti- gravitropism Gravity -turning due to gravity Thigmo Thigmotropism Touch -turning due to touch Hydro- hydrotropism Water

11 -turning due to gravity
Word Meaning -tropism turning Photo- phototropism light -turning due to light Graviti- gravitropism Gravity -turning due to gravity Thigmo Thigmotropism Touch -turning due to touch Hydro- hydrotropism Water -turning due to water

12 Positive or Negative A tropism is positive if the affected plant part grows toward the stimulus. A tropism is negative if the plant part grows away from the stimulus. Example: Plant is…. Negative gravitropism Positive phototropism

13 Phototropism https://www.youtube.com/watch?v=zHe7y8cy-7Y

14 Gravitropism (Geotropism)

15 Thigmotropism http://www.youtube.com/watch?v=yMHmU3eZsYk
Stop video at 1:30 uHlPLQU

16 Venus Fly Trap The Venus Fly Trap closes when the leaves are touched.
This is an example of thigmotropism.

17 Deadly Plants

Download ppt "Tropism We will: Describe the effects of external stimuli on plant growth and development You will: Identify the types of tropisms exhibited by plants."

Similar presentations

October 13, 2014 Pick up your table’s journals. Write “Forces in Plants” in the table of contents. Forces in Plants page 20.

October 13, 2014 Pick up your table’s journals. Write “Forces in Plants” in the table of contents. Forces in Plants page 20.
Look at the following pictures and describe what types of tropism you see. Are they positive or negative?

Look at the following pictures and describe what types of tropism you see. Are they positive or negative?
Stimulus & Response TEKS 7.13B describe and relate responses in organisms that may result from internal stimuli such as wilting in plants and fever or.

Stimulus & Response TEKS 7.13B describe and relate responses in organisms that may result from internal stimuli such as wilting in plants and fever or.
TROPISM NEXT.

TROPISM NEXT.
Tropism Foldable Fold the construction paper in half hamburger style then unfold it and fold it in half again this time hot dog style. 1 Unfold the paper.

Tropism Foldable Fold the construction paper in half hamburger style then unfold it and fold it in half again this time hot dog style. 1 Unfold the paper.
Tropisms.

Tropisms.
Plants & External Stimuli. When someone shines a bright light in your face, how do you respond?

Plants & External Stimuli. When someone shines a bright light in your face, how do you respond?
Tropisms and Turgor Responses

Tropisms and Turgor Responses
Tropisms.

Tropisms.
Introduction When someone touches you, you turn and look. When you hear a loud noise, you may jump. These are known as STIMULUS and RESPONSE. Something.

Introduction When someone touches you, you turn and look. When you hear a loud noise, you may jump. These are known as STIMULUS and RESPONSE. Something.
By: Annie, Marcos, Joe, Liz.   Tropism in plants are a growth or movement in response to a direct stimulu s What is Tropism in Plants ?

By: Annie, Marcos, Joe, Liz.   Tropism in plants are a growth or movement in response to a direct stimulu s What is Tropism in Plants ?
TROPISM NEXT. . There are three main types of tropisms : Phototropism Geotropism Hydrotropism TROPISM refers to plant growth in response to something.

TROPISM NEXT. . There are three main types of tropisms : Phototropism Geotropism Hydrotropism TROPISM refers to plant growth in response to something.
- Negative Tropism = To turn away from a stimulus + Positive Tropism = To turn towards a stimulus.

- Negative Tropism = To turn away from a stimulus + Positive Tropism = To turn towards a stimulus.
Plant Tropisms. TROPISM is a biological phenomenon, indicating growth or turning movement of a plant in response to an environmental stimulus.

Plant Tropisms. TROPISM is a biological phenomenon, indicating growth or turning movement of a plant in response to an environmental stimulus.
Plants: Environmental Reactions Year 1 Science. EQ In what ways do plants react to their surroundings for the purpose of survival?

Plants: Environmental Reactions Year 1 Science. EQ In what ways do plants react to their surroundings for the purpose of survival?
Tropisms To turn toward or away from a stimulus. Toward is positive Away is negative

Tropisms To turn toward or away from a stimulus. Toward is positive Away is negative
Plant Respond To Their Environment How many of you have ever been alone in a room watching a movie and the phone rings and you have jumped? You responded.

Plant Respond To Their Environment How many of you have ever been alone in a room watching a movie and the phone rings and you have jumped? You responded.
Tropisms and Photosynthesis. Tropisms Tropism is the growth of a plant towards or away from a stimulus A Stimulus is something that causes change like.

Tropisms and Photosynthesis. Tropisms Tropism is the growth of a plant towards or away from a stimulus A Stimulus is something that causes change like.
TROPISM NEXT.

TROPISM NEXT.
Plant Tropisms. What are we talking about? Emergence - An outgrowth, as a projection, on the surface of a plant Force – A push or a pull Turgor Pressure.

Plant Tropisms. What are we talking about? Emergence - An outgrowth, as a projection, on the surface of a plant Force – A push or a pull Turgor Pressure.

Similar presentations

Ads by Google