Leaves

1
Leaves
I. Leaves A. Function B. Anatomy of a leaf 1.
blades and petioles 2. leaf types 3. vein
patterns 4. other features of leaves C. Leaves
of grass D. Conifer leaves E. Modified
leaves II. Inside leaves A. Cellular
organization 1. epidermis 2. mesophyll two
parts a- palisade cells b- spongy cells B.
Water loss- cuticles C. Stomata D. Sun leaves
and shade leaves
2
I. Leaves
light energy
CO2
H2O
gtgtgtgtgt
C6H12O6
O2
A. Function B. Anatomy of a leaf 1. blades and
petioles 2. leaf types
chloroplasts
/ chlorophyll
blade
petiole
Simple leaf
leaflets
Compound leaf
3
B. Anatomy of a leaf
3. vein patterns 4. other features of leaves
4
B. Anatomy of a leaf
5
C. Leaves of grass
Intercalary meristems
Evolutionary pressures
fire
herbivory
mowing
6
D. Conifer leaves
Douglas fir
epidermis
Western white pine
sunken stomata
waxy
hypodermis
thick mesophyll
endodermis
Western redcedar
7
E. Modified leaves
bracts
8
II. Inside leaves
A. Cellular organization 1. epidermis 2.
mesophyll two parts a- palisade cells b-
spongy cells 3. veins phloem and xylem B. Water
loss- cuticles
cuticle
9
C. Stomata
10
C. Stomata
Stomata opening and closing
11
D. Sun leaves and shade leaves






Sun leaves
Shade leaves
Explanation
thick
Cuticle
thin
Chlorophyll
low (light)
high (dark)
Aspect (horizontal/ vertical)
vertical
horizontal
Sunken stomata
yes
no
Hairy
yes
no
12
The end