Leaves Flashcards
Expanded, flattened green structure growing out at the
node of the stem
Leaves
where does leaf arises?
from the activity of leaf primordium
2 Functions
Photosynthesis and Transpiration
The process by which plant loses water
Transpiration
Transpiration is for
continuous uptake of water
cooling effects
to control degree of saturation of cell with water that may cause rottening of leaves
popular herb family is the
mint family
Poison hemlock
Conium maculatum
nature of the blade - one blade of just one part
Simple
nature of the blade - with a blade divided into leaflets or pinnae or pinnule.
Compund
leaflets are attached to the end of the petiole
Palmately Compound
2 leaf lets palmately compound
bifoliate
one rachis pinnately compound
Simple pinnately compound
three rachis pinnately compound
Tripinnately compound
arrangement of veins on the blade
Venation pattern
Give three Netted Venation Pattern
Pinnately netted
Palmately netted
Radiatedly netted
Give 4 Parallel venation pattern
Palmately Parallel ex. anahaw
Veins parallel to the Midrib
Veins acute angles to the midrib
Veins perpendicular o the midrib
arrangement of leaves on the stem
Phyllotaxy
in ____: monocot leaf that undergoes C4 metabolism
Kranz Anatomy or wreath ana.
are large vacuolated epidermal cells that inroll the leaf during hot conditions
Bulliform cells
Bulliform cells is present only in monocot. T or F?
True
detachment area of leaves from the stem.
Abscission zone
leaf aging due to breakdown of chlorophyll, sugars and loss of photosynthetic ability.
Senescence
thick and fleshy, reduced surface- volume- ratio.
Succelent Leaves
thick sclerenchyma, resistant to animals, fungi, freezing temp, and UV, very thick cuticle.
Sclerophyllous foliage
no blade and needle shaped
Spines
sensing contact with other objects, no lamina.
Tendrils
digest insects and obtain nitrogen for their amino acid
Insect traps
produce plantlets
Adventitious buds
for attraction
Colored leaves
aerenchymatous leaf base for buoyancy and support
Floats
supporting leaf bases
pseudotrunk
display “thigmonasty” sensitivity to touch, for protection
Motile leaves
added photosynthesis
Expanded leaf-like petiole or stipule
