plant structure stems roots leaves. review…………………
TRANSCRIPT
Plant Structure
• Stems• Roots • Leaves
Review…………………
Leaves
Stem
Roots
Three vegetative organs of a generalized plant
Shoo
tRo
ot
root tip at microscope 10x
Shoot meristems at microscope 10x
APICAL MERISTEMS
Major Tissues of vegetative organs
• Outer protective covering of a plant organDermal
• Fills interior of the organ; photosynthesizes and stores products of photosynthesis.
Ground
• Transports water and sugarVascular
Shoo
tRo
ot
ROOT SYSTEM
Roots…..Anchor the plant in soilAbsorb water and minerals from soilStores products of photosynthesis
Zone
of E
long
ation
ANATOMY OF A ROOT TIP
Root
Cap
Monocot Vs. Dicot Root
Monocot Root Dicot Root
Root Diversity
Fibrous RootTap root
STEM SYSTEMSupport
Stem Diversity
Pingao (Ficinia spiralis) spreads by forming stolons
in the sand.
Ginger (Rhizomes)
Tuber
Corm
Woody Stems
Woody Stems are the stems of plants who have been growing for two years or more.
After two years, a plant's stem thickens to accommodate growth and increased circulation in a plant.
example - tree trunk
How old is the tree in the window?
LEAVES
LEAVES• The organ that produces
food for the plant –photosynthesis.
• Well adapted for gathering light.
Leaf Anatomy
Leaf AnatomyCuticleStomaGuard cellsParenchymaCollenchyma
Vascular tissue:
Vein Xylem Phloem
Leaf Diversity
Leaf diversity for us
• A simple leaf has a single blade.
• A compound leaf has multiple blades (or leaflets) arranged along an axis or radiating from a central point.
Dicot Leaf
Monocot Leaf
Monocot vs. Dicot leaf