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12.4 Roots

12.4 Roots. Pages 558-563. Roots. Ta Phrohm temple in Cambodia. Function. Anchor plant Absorb water and nutrients Store water and carbohydrates. Types of Roots. Taproot Fibrous roots. Root hairs. Microscopic hair-like outgrowth from an epidermal cell.

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12.4 Roots

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  1. 12.4 Roots Pages 558-563

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

  7. Root cap • Thick layer of cells produces a slippery substance allowing root to penetrate soil • Meristem

  8. Cortex • Parenchyma • Stores carbohydrate • Water passes through cortex

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

  10. Vascular cylinder • Eudicot Monocot • Gymnosperms

  11. 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

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

  13. Uses of roots • Food • Medicine • Erosion control

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