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Leaves - Coggle Diagram
Leaves
Internal structure of foliage leaves
Petiole
Have more vascular bundles called leaf traces
Two small flaps called stipules
They are massive in plants
Vascular tissue
Lateral veins emerge into narrow veins
water moves by capillary action
Located between pallisade parenchyma and spongy mesophyll
Epidermis
Cuticle
Transpiration
Epidermal cells
Flat, tubular
Trichomes
Guard cells
Stomata
Prevalent in lower epidermis
Mesophyll
Spongy mesophyll
Allows carbon dioxide to diffuse
Loose aerenchyma
Ground tissues
Pallisade mesophyll
Main Photosynthetic tissue in most plants
External structure of foliage leaves
Petiole
Long petiole
Stalk
Holds the blade out of the sun
Lead
Lacks petiole
Aeonium
Veins
Parallel Venation
Reticulate Venation
Functions
Distributes water to the cell
Collects sugars produced by photosynthesis
Transports sugars to stem
Leaf blade
Dorsal surface
Simple
Flat
Compound
Petiolute
Attach the leaflets
Palmately compound
Rachis
Extension of petiole
Pinnately compound
Lamina
Ventral surface
Functions
Prevents water loss
Photosynthesis
Initiation and development of leaves
Monocots
Form primordium
Encircle shoot apical meristem
Initiated by shoot apical meristem
Lamina
Abxial epidermis
The inner surface
Adxial epidermis
The outer surface
Constant basal expansion
differentiation of sieve tube members and vessel elements
Stretches the protoxylem and protophloem
Initiation of primary xylem, phloem and the stomata
Eudicots and basal angiosperm
Anatomy and morphology of leaf types
Succulent leaves
They are adapted to dry ecosystem
Thick and fleshy
Reduce surface area
water conservation
Mesophyll
Few air spaces
Families
Aizoaceae
Portulaceae
Crassulaceae
Bud scales
Provides protection
Corky
Provides extra protection
Petioles are short and absent
They are not involved in photosynthetic avtivities
Tendrils
It's function is to support the other leaves
Modified leaf
Grows indefinitely
Detrimental lamina
Sclerophyllus foliage leaves
Produce sugar by photosynthesis
Perennial leaves
Exists in plants for more than two years
Soft, flexible, and edible
Leaf with Kranz Anatomy
No pallisade parenchyma and spongy mesophyll
Has bundle sheaths
Made up of large chlorophyll cells
Occurs in plants that use C4 for photosynthesis
Adapted to the environment (arid)