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