1. 4.8 Roots
Pages

2. Roots

3. Ta Phrohm temple in Cambodia

4. Function Anchor plant Absorb water and nutrients
Store water and carbohydrates

5. Types of Roots
Taproot Fibrous roots

6. Tap root vs. Fibrous Root
Large, thick main root
Many small roots
Lateral roots possible
Root hairs
Gymnosperms and angiosperm eudicots
Angiosperm monocots

7. Root hairs Microscopic hair-like outgrowth from an epidermal cell.
Increase surface area for absorption

8. Root cap slippery substance produces allows root to penetrate soil
meristem

9. Root Cortex
Parenchyma
Stores carbohydrate
Water passes through cortex

10. Endodermis Wrapped with a wax-like substance.
Form a barrier called the Casparian strip

11. Vascular cylinder
Monocot Eudicot

12. Monocot vs. Eudicot Monocot Root Eudicot and Gymnosperm Roots
Parenchyma cells in centre
No central parenchyma cells
Xylem and Phloem in a ring around parenchyma cells
Xylem and phloem X-shape arrangement in centre of root

13. Root Specializations
80% of plants have mutualistic relationships with mycorrhizal fungi
Also, nitrogen-fixing bacteria such as Rhizobia are found in the root nodules of legumes

14. Roots continued… Tuberous roots: lateral roots used for storage
For example: yam
Adventitious root: prop root

15. Uses of roots
Food
Medicine
Erosion control