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Chapter 6 Leaves (morphology and anatomy of other leaves (sclerophyllous…
Chapter 6 Leaves
morphology and anatomy of other leaves
succulent leaves
thick
fleshy
water conservation
sclerophyllous foliage leaves
more sugars
soft
flexible
edible
leaves of conifers
sclerophylls
thick cuticle
epidermis and hypodermis
thick walls
bud scales
shoot apical meristems
#
protected
low temps
drying action by wind
protection
spines
cactus spines
modified leaves
auxiliary buds
protection
tendrils
peas, cucumber, squash
grow indefinitely
capable of sensing contact
leaves with kranz anatomy
C4 photosynthesis
lacks
palisade parenchyma, spongy mesophyll
insect traps
ability to
trap and digest insects
internal structure
epidermis
guard cells
trichomes
mesophyll
#
palisade parenchyma
main photosynthetic tissue
spongy mesophyll
open loose aerenchyma
CO2 diffuses rapidly
vascular tissues
midvain
lateral veins
minor veins
petiole
stipules
#
protect shoot apical meristem
leaf traces
external structure
leaf blade
light harvesting
petiole
stalk
simple leaf
blade of 1 part
compound leaf
blade is divided
leaflets
initiation and development
basal angiosperms and eudicots
leaf primordium
monocots
initiated by shoot apical meristem
form leaf primordial
protects apical meristem when leaf is young and small
internal parts of the leaf blade when light is harvested
both used to protect apical meristem
