Roots And Shoots

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root and shoot anatomy

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  • Roots And Shoots

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

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