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Roots And Shoots
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  • 1. Plant Growth, Development, and Morphology: Roots and Shoots Friday, August 25 th - Read pages 34-43 in text. Buddy Tignor, Ph.D.
  • 2. Overall Plant Structure Source: Raven, Evert, and Eichhorn. 1986. Biology of Plants. 4 th Ed. Worth Publishers, Inc.
  • 3. More Examples: Source: Raven, Evert, and Eichhorn. 1986. Biology of Plants. 4 th Ed. Worth Publishers, Inc.
  • 4. Final Example: Source: Raven, Evert, and Eichhorn. 1986. Biology of Plants. 4 th Ed. Worth Publishers, Inc.
  • 5. Root Functions:
    • Anchoring the plant (citrus tap root)
    • Absorbing water and minerals from the soil and transporting them to the stem
    • Food Storage (Carrot)
    • Aeration (Black Mangrove and Cypress; pneumatophores)
    • Support (Red Mangrove and Corn; Proproots)
  • 6. Root Systems Consist of:
    • Primary roots
    • Secondary roots (rootlets)
    • Root Hairs
  • 7. Three Basic Types of Root Systems: Fibrous Taproot Storage Taproot Source: Raven, Evert, and Eichhorn. 1986. Biology of Plants. 4 th Ed. Worth Publishers, Inc. Smith. 2000.The Vegetable Gardener’s Bible. Storey Books. Pownal, VT.
  • 8. Other Important Root Terms:
    • Root Hairs
    • Fleshy Roots
    • Aerial Roots
    • Knees
  • 9. Root Hairs:
    • Root hairs are tubular extensions of epidermal cells
    • Increase root surface area
    • Greatly increases plants ability to absorb water and minerals from the soil.
  • 10. Fleshy Roots:
  • 11. Aerial Roots:
  • 12. Roots with a support function:
  • 13. Stems: Parker. 1998. Introduction to Plant Science. Delmar Publishers. New York.
  • 14. Stem Functions:
    • Attachment point for leaves, flowers, and fruit
    • House the vascular system
    • Storage (tubers, corms, bulbs, rhizomes)
    • Can serve to help plant spread (runners, tendrils, thorns
  • 15. Crowns
    • Short inconspicuous stems:
  • 16. Simple: No branches
  • 17. Other types of stems
    • Branched (many plants)
    • Climbing
    • Creeping
    • Rhizomes (potatoes)
    • Stolons (stem connecting strawberry daughter plants to the mother plant)