1. Plant Responses and Adaptations

2. Plant Adaptations
Adaptations help plants survive (live and grow) in different areas(biomes).
Adaptations - features that allow a plant or animal to live in a particular place or habitat.

3. Adaptations of Plants
Absorbing Nutrients –absorb mineral nutrients from soil. (roots)
Preventing Water Loss
-cuticle – watertight, waxy outer covering
-epidermis – outer layer of plant
-stomata –small openings
guard cells – cells around stomatas which help them to open.
Reproducing on Land –use pollen to reproduce

5. Adaptations of Plants 4. Advantages of Conducting Tissues
- Vascular plants have tissues that transport water and nutrients.
5. Advantages of seeds
- Protection
- Nourishment
- Dispersal
- Delayed growth
6. Advantages of Flowers – Color/ scent help with pollination (reproduction)

6. What are some adaptations in different habitats?

7. Desert Adaptation
This plant has a waxy coating on its leaves to prevent water loss.
This cactus displays light-colored hair that helps shade the plant and hair to help shade the plant, reducing water loss.

8. Tropical Rainforest Plant Adaptation
Drip-tips on leaves help shed excess water. Broad leaves help get sunlight.
Prop roots help support plants in the shallow soil.

9. Temperate Rainforest Plant Adaptation
Epiphytes live on other plants to reach the sunlight.
Trees can grow very tall in this very moist environment.

10. Temperate Deciduous Forest
Wild flowers grow in the spring before trees grow their leaves.
In the autumn, deciduous trees drop their leaves to minimize water loss.  

11. Temperate Deciduous Forest Plant Adaptations
Many trees have thick bark to protect against cold winters .
Broad leaves can capture a lot of sunlight for a tree.

12. Plant Growth & Responses

13. Hormone-producing
cells
A. Hormones in Plants
1. Plant cells produce hormones, which are chemical messengers, that travel throughout plant causing other cells called target cells to respond.
2. In plants, hormones control:
Plant growth & development
Plant responses to environment
Flower Blooming
Movement
of hormone
Target
cells
Cells in one blooming flower signals other blooms using hormones to open.

14. B. Plant cells will send signals to one another to tell them:
When trees to drop their leaves.
When to start new growth.
When to cause fruit to ripen.
When to cause flowers to bloom.
When to cause seeds to sprout.
Sprouting
Corn Seeds
Tree Budding
Fruit Ripening
Cactus Blooming
Leaf Drop

15. Important Hormones
Gibberellins - responsible for plants growing into adult plants and flower growth
Ethylene – causes fruits to ripen
Auxins - responsible for geotropisms and phototropisms
Ethylene released by apples and tomatoes causes fruit to age quickly.

16. D. Plant Tropisms
Tropism: the way a plant grows in response to stimuli in the environment.
Phototropism: growth response to light
Plants bend towards light
Gravitrophism: growth response to gravity
plant roots grow down with gravity, shoots (stems) grow up against gravity and out of the soil.
Also called geotrophism
Thigmotropism: growth response to touch
vines grow up around trees, Venus flytrap closes when leaves are touched

17. Phototropism Gravitropism
Slide # 23
What type of tropism is shown in these pictures?
Phototropism
Gravitropism
Phototropism
Thigmotropism
Gravitropism
Thigmotropism

18. Plants in our lives
Fruits and vegetables
Crops
Wood
medicine
Fibers