BOTAONE T2
Botany Lecture AY 22-23
leaves
TRANS: TOPIC
————————Outline———————— definition
I. De nition
- exhibit photosynthesis
II. Photosynthesis
- exchange of gases
III. Adaptations
• Desert Plants (Xerophytes) take in oxygen and
• Floating Leaves Respiration release carbon
• Submerged Leaves dioxide
• Conifers
IV. Leaf Morphology take in carbon dioxide
Photosynthesis
• Types of Leaves and release oxygen
• Attachment water vapor lost from
• Venation Traspiration
surface
• Phyllotaxy
• Shape
• Base
• Margin Photosynthesis
• Apex - conversion of light energy to chemical energy
V. Leaf Anatomy - manufactured from carbon dioxide and water
• Cuticle
• Leaf Epidermis
> Ordinary Epidermal Cells adaptations
> Trichomes
> Guard Cells desert Leaves
- Stomata - thick and reduced leaves
• Blade - stomata opens only at nighttime
• Petiole - thick waxy layer
VI. Monocot Leaves
• Ligule
• Auricle floating leaves
• Bulliform Cells - stomates only on upper epidermis
VII. Eudicot Leaves
VIII. Specialized or Modi ed Leaves
• Cotyledons submerged leaves
• Colored Bracts - no stomates
• Insect-trapping Leaves
• Tendrils
• Spines conifers
• Storage Leaves
• Absorptive Leaves - w/ waxy needleleaves
Reproductive Leaves - evergreen
• Window Leaves - thick, waxy cuticle
• Flower Pot Leaves - sunken stomata
IX. Plant Adaptations
• Mesophytes leaf morphology
• Xerophytes
• Halophytes 1. types 5. shape
> Angiosperm 2. attachment 6. base
• Hydrophytes 3. venation 7. margin
X. Leaf Abscission 4. phyllotaxy 8. apex
XI. Economic Importance
Joshua Mercado 12230278
fi fi
, BOTAONE T2
Botany Lecture AY 22-23
leaves
types of leaves shape or outline of leaves
simple
- single blade per petiole
complex
- mechanical stress
- divided into smaller lea ets
- originate from single axillary bud
pinnately
- lea et pairs along extension of petiole venation
- arrangement of veins
palmately
- all lea ets attached at same point at end of parallel venation
petiole - running parallel with one another
netted
pinnately
- one primary vein (within enlarged midrib)
palmately
- several primary veins fan out
leaf attachment
Figure 1 - netted venation
Figure 2 - parallel venation
phyllotaxy
- leaf arrangement on stem
alternate
- attached spiral along stem w/ one leaf per
node
Joshua Mercado 12230278
fl fl
fl
Botany Lecture AY 22-23
leaves
TRANS: TOPIC
————————Outline———————— definition
I. De nition
- exhibit photosynthesis
II. Photosynthesis
- exchange of gases
III. Adaptations
• Desert Plants (Xerophytes) take in oxygen and
• Floating Leaves Respiration release carbon
• Submerged Leaves dioxide
• Conifers
IV. Leaf Morphology take in carbon dioxide
Photosynthesis
• Types of Leaves and release oxygen
• Attachment water vapor lost from
• Venation Traspiration
surface
• Phyllotaxy
• Shape
• Base
• Margin Photosynthesis
• Apex - conversion of light energy to chemical energy
V. Leaf Anatomy - manufactured from carbon dioxide and water
• Cuticle
• Leaf Epidermis
> Ordinary Epidermal Cells adaptations
> Trichomes
> Guard Cells desert Leaves
- Stomata - thick and reduced leaves
• Blade - stomata opens only at nighttime
• Petiole - thick waxy layer
VI. Monocot Leaves
• Ligule
• Auricle floating leaves
• Bulliform Cells - stomates only on upper epidermis
VII. Eudicot Leaves
VIII. Specialized or Modi ed Leaves
• Cotyledons submerged leaves
• Colored Bracts - no stomates
• Insect-trapping Leaves
• Tendrils
• Spines conifers
• Storage Leaves
• Absorptive Leaves - w/ waxy needleleaves
Reproductive Leaves - evergreen
• Window Leaves - thick, waxy cuticle
• Flower Pot Leaves - sunken stomata
IX. Plant Adaptations
• Mesophytes leaf morphology
• Xerophytes
• Halophytes 1. types 5. shape
> Angiosperm 2. attachment 6. base
• Hydrophytes 3. venation 7. margin
X. Leaf Abscission 4. phyllotaxy 8. apex
XI. Economic Importance
Joshua Mercado 12230278
fi fi
, BOTAONE T2
Botany Lecture AY 22-23
leaves
types of leaves shape or outline of leaves
simple
- single blade per petiole
complex
- mechanical stress
- divided into smaller lea ets
- originate from single axillary bud
pinnately
- lea et pairs along extension of petiole venation
- arrangement of veins
palmately
- all lea ets attached at same point at end of parallel venation
petiole - running parallel with one another
netted
pinnately
- one primary vein (within enlarged midrib)
palmately
- several primary veins fan out
leaf attachment
Figure 1 - netted venation
Figure 2 - parallel venation
phyllotaxy
- leaf arrangement on stem
alternate
- attached spiral along stem w/ one leaf per
node
Joshua Mercado 12230278
fl fl
fl
