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Ch. 6 Leaves - Coggle Diagram
Ch. 6 Leaves
External Structure of Leaves
Leaf blade
Lamina
Dorsal surface
Abaxial side
Ventral surface
Adaxial
Petiole
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stalk
Sessile leaf
Sheathing leaf base
Leaf Blade
Simple
One part
Compound
Several individual parts
Abscission zone
Morphology and Anattomy
Succulent Leaves
Sclerophyllous Foliage Leaves
Leaves of Conifers
Bud Scales
Evolutionary conversion
Spines
Cacti
Microscopicgreen leaves
Spines
Auxiliary bud
Tendrils
Grow indefinitely
Can sense contact of other objects
Leaves with Kranz Anatomy
C4 photosynthesis
Insect Traps
Pitcher leaves
Passive trap
Trichomes point downward
Leaves of sundew
Active trap
glandular trichomes
Venus Fly trap
Active trap
two hairs must stimulate
Internal Structure of Leaves
Epidermis
Transpiration
Water Loss
Hairy
Mesophyll
Palisade parenchyma
main photosynthetic tissue
Upper
Spongy mesophyll
Carbon dioxide diffusion
Lower
Vascular Tissue
Midrib
midvein
Conduction
Lateral veins
Conduction
Minor veins
Release water from xylem
Load sugar into phloem
Bundle Sheath
Around vascular tissue
Bundle sheath extension
Petiole
Leaf traces
Vascular bundles
Stipules
Two small flaps of tissue
Various functions
Initiation/development of Leaves
Basal Angiosperms & Eudicots
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Leaf primordium
Consists of leaf protoderm
Consists of ground meristem
All cells meristematic
dense cytoplasm
small vacuoles
Monocots
Photosynthesis not as effective
Broad stems store water
Surface area remains constant
Accordion-like, pleated surface
"ribs"
Water ^ = ribs become wider
water v = ribs become narrower