LEAF Flashcards
Occur only in plants
Evaporation/loss of water
Transpiration
Occur in the leaves while their stomata are open for the passage of CO2 and O2 during photosynthesis
Transpiration
Photosynthetic organ of the plant
Leaf
2primary functions of the leaf
Photosynthesis
Transpiration
Collective term for all the leaves of the plants
Phyllome
4other functions of the leaf
To protect:
-vegetative organs
-inflorescence
-Flowers
To store nutrients for cotyledon
5 parts of the leaf
Petiole/leaf stack
Leaf sheath
Pulvinus
Stipule
Ligule
Attachment leading from the node to the blade
Petiole/leaft stack
Attaches the leaf to the node
Leaf sheath
Enlargement at the base of the petiole
Pulvinus
Leaf-like structure attached to the pulvinus
Stipule
Hairy structure at the junction of betw. The leaf sheath and the blade to avoid dessication
Ligule
5parts of the leaf(in picture)
Midrib
Veins
Blade
Petiole
Stipule
4common morphological structure in dicot&monocot plant
Base/lamina
Margin
Midrib
Tip/apex
Flat expanded green portion of the leaf
Base/lamina
Edge of the leaf
Key characteristic that helps identify the plant
Margin
Central vein(vascular path of the blade)
Midrib
End oart of the leaf
Tip/apex
2types of leaf
Simple
Compound
Only 1 blade
Simple leaf
Blade is subdivided called leaflets
Compound
Attach to the rachis by the means of petiole
Leaflets/pinnae
2typs of compound leaf
Pinnately compound
Palmately compound
Leaves are Arranged in a circular pattern
Palmately compound
Leaves are Aranged along the sude of the rachis
Pinnately compound
Type of venation in monocot
Parallel venation
Type of venation in dicot
Reticulate/netted
2types of netted
Pinnately netted
Palmately netted
Main vein called midrub with secondarg veins branching from it
Pinnately netted
Veins radiate out of base of blade
Palmately netted
System of leaf arrangement on the stem
Phyllotaxy
One leaf is formed at each node and they are arranged 1 above the other
Alternate phyllotaxy
3types of phyllotaxy
Alternate
Opposite
Whorled/verticillate
2leavez are formed at a node
Opposite
3or more lwaves arise from a node
Whorled/verticillate
7 internal structure of the leaf
Epidermis
Mesophyll
Vascular bundle
Upper epidermis
Cuticle
Stomata
Guard cells
3 types of stomata
Epistomata
Hypostomata
Amphistomata
Stomata located on the upper epideemis of the leaf
Epistomata
Stomata located on the lower epidermis of the leaf
Hypostomata
Stomata located on the both epidermis of the leaf
Amphistomata
This internal structure of the leaf is to facilitate movement of oxygen, carbon dioxide, and water vapor
Spongy mesophyll
Distinct concentric arrangement of chloroplast containing bundle sheath cells, surrounding the vasculat bundle
Kranz anatomy
10 modified leaves
Tendrils
Spines
Succulent
Thorns
Scale-like leaf
Bract/showy leaves
Expanded petiole
Insect-trapping leaf
Float
Plantlet at a notch
To climb or support weak stem
Tendrils
To reduce water loss and protect from herbivory
Spines
Thick, fleshy leaf, usually modified for water storage
Succulent
Arising in the axils of leaves of woody plants
Thorns
Leaf holding a flower(colored)
Bract/showy leaves
For photosynthesis
Expanded petiole
For buoyancy
Float
For asexual reproduction
Plantlet at a notch