Plant Structure and Function:
Roots
Monocot Root
Dicot Root
Cortex
Pericycle
Epidermis
Mag: 100X
Mag: 400X
Mag: 100X
Vascular Tissue:
Xylem
Phloem
Mag: 400X
How does the root control movement of materials
into the vascular tissue?
Epidermis
Cortex
Endodermal Cells
Casparian Strip
Wax coated cells
that blocks water
And forces
materials to move
through the
endodermal cells
Root Hairs
Path of absorbed solutes
Xylem cells
Comparison: Actual root tip to diagram
Mag. 40x
Vascular
tissue
Pericycle
Endodermis, (layer of
cells outside the pericycle)
Apical
meristem
Root Cap
Mag. 40x
Mag 100x
Corn Root Tip
Apical Meristem
Area of Cell division
Root cap
Dividing cells
What stage of mitosis
are these in?
Epidermis
Mag. 400x
Wheat Root Hairs
Epidermal Cell
with root hair extension
Mag. 100x
Root hair
Lateral Root Growth
Mag 100x
Epidermal cell
Root Hair
Mag 400x
Lateral roots
beginning to
grow from the
pericycle
Pericycle
Air,Water and Soil Root Adaptations
Multiple layers
of cells make up
the epidermis.
Which plant would
need extra protection?
No Epidermis,
has cells that
store air. Which
plant would need a
supply of air?
One layer of
cells in the
Epidermis
Rhizobium
Root Nodule
Which part is the root cross section
and which is the bacteria nodule?
Nodule,
(Lacks vascular tissue)
What structures give away
the answer?
Root(Notice Vascular Tissue)
Mag. 100x