Plant Structure
• Stems
• Roots
• Leaves
Review…………………
Three vegetative organs of a generalized plant
Leaves
Stem
Roots
APICAL MERISTEMS
Root
Shoot
Shoot meristems at microscope 10x
root tip at microscope 10x
Major Tissues of vegetative organs
• Outer protective covering of
a plant organ
Ground
• Fills interior of the organ;
photosynthesizes and stores
products of photosynthesis.
Vascular
• Transports water and sugar
Root
Shoot
Dermal
ROOT SYSTEM
Roots…..
Anchor the plant in soil
Absorb water and minerals from soil
Stores products of photosynthesis
Root Cap
Zone of Elongation
ANATOMY OF A ROOT TIP
Monocot Vs. Dicot Root
Monocot Root
Dicot Root
Root Diversity
Tap root
Fibrous Root
STEM SYSTEM
Support
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
• The organ that produces
food for the plant –
photosynthesis.
• Well adapted for gathering
light.
Leaf Anatomy
Leaf Anatomy
Cuticle
Stoma
Guard cells
Parenchyma
Collenchyma
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.
Monocot vs. Dicot leaf
Dicot Leaf
Monocot Leaf