Download Roots, Stems, and Leaves

23.2 - Root Functions
1.
2.
3.
4.
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ROOTS - types
1. Two types
a. -i. -ii. Dandelions
iii. Carrots, Radishes
b. -i. -ii. Grass, Green Onions
ROOTS – Parts of roots
1. --a. --b. Root hairs attached where water
enters
2. Cortex
a. Spongy layer of ground tissue
3. Endodermis
a. Encloses vascular cylinder
4. --a. ---
5. -a. ---
6. --a. ---
STEMS - Functions
1.
2.
3.
4.
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STEMS - Types
Types of Stems
1. --- stems
2. --- stems
3. --- Stems
a.
b.
c.
d.
Rhizomes – iris
--Bulbs – tulip
Corms - crocus
Growth of Stems
1. --a. --b. Only at ends of plant
2. --a. --b. Vascular cambium increases
thickness
23.2 - Leaf Functions
Functions
1. --a. --- in leaf
2. --a. ---
3. --a. --- just enough to allow gas
exchange to take place during
photosynthesis
LEAVES - Parts
Structures
1. Blade
a. Collects sunlight
2. Petiole
a. Leaf to stem
3. Epidermis
a. Cover top and bottom of leaf
4. --a. ---
5. --a.
b.
c.
d.
Just under epidermis
Most chloroplasts here
Absorb light
---
LEAVES - Parts
Structures (continued)
1. --a. Beneath palisade
b. Airy spaces
c. ---
2. ---
a. --b. Veins of leaf
3. ---
a. ---
4. ---
a. ---
Leaf Adaptations
1. Desert Plants
a.
b.
c.
d.
------cactus
2. Pitcher Plants
a. --b. Live in poor soil areas
24.2 - Flowers
4 Organs
1. --2. --3. --- gametes form
a. Filament-long, thin
stalk
b. ---
4. --- gametes form
a. --b. --- -stalk
c. ----pollen grains land
Flowers
2 Types of Flowers
1. --a. ---
2. --a. ---
Fruits
1. --2. ---
Photoperiodism
1. Length of daylight and darkness
each day affects plant growth and
timing of reproduction
2. Critical period
a. Each plant species has specific daylightdarkness conditions that will make
flowering start
3. --a.
b.
c.
d.
---- number of daylight hours is shorter
--- - number of daylight hours longer
--- – range
--- - will not flower if days are longer or
shorter than its critical period