Root Development
Root Cap
• Thimble shaped mass
of cells
• Covers tip of root
• Protects as the root
pushes through the
soil
Region of Cell Division
• Tissue of
actively dividing
cells
• In center of
root tip
• Produces root
cap
Region of Elongation
• Found 1cm or less
from the root tip
• Cells become
longer and wider
Region of Maturation
• Cells differentiate (mature) into
distinct types of tissue
• Root hairs are present here
• Root hairs absorb water and minerals
• Very numerous: 38,000 per square cm in
typical corn plant=suface area of
football field!
3/23/16 Journal # 9
Root Tip Drawings
* Create 2 circles with a petri dish on one
clean journal page.
* Label below the circle:
1. Type of Root/Plant on slide “Root Hairs”
Or “Allium” (onion root tip—label 4
regions)
2. Magnification used
3. COLOR / NEATNESS/DETAIL will all
factor in to the grade you receive!!!!
#1Example: Label all 4 Regions!
LOWEST POWER IS
BEST
4x or 10x
Allium Root Tip
#2 Example: Root Hairs
LOWEST POWER
IS BEST
4x or 10x
#3 Ranunculus (buttercup)
Root
Example:
Ranunculus Root
10x or 40x