Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Plant tissues (tbp)


Published on

Donated to SIYAVULA by Jenna Hellack

Published in: Technology, Education
  • Be the first to comment

Plant tissues (tbp)

  1. 1. Plant Tissues: Overview Many of the figures found in this presentation are from the internet site and a CD entitled “Plant Anatomy” by Richard Crang & Andrey Vassilyev published by McGraw Hill.
  2. 2. Meristematic tissues – localized regions of cell division <ul><li>Apical Meristems </li></ul><ul><ul><li>Primary or Transitional Meristem  Primary growth </li></ul></ul><ul><li>Lateral Meristems </li></ul><ul><ul><li>Vascular cambium  secondary vascular tissues </li></ul></ul>
  3. 3. Illustration from: <ul><li>Interphase </li></ul><ul><li>Prophase </li></ul><ul><li>Metaphase </li></ul><ul><li>Anaphase </li></ul><ul><li>Telophase </li></ul><ul><li>Cytokinesis </li></ul>Cell Division: Mitosis (nuclear division) + Cytokinesis (cytoplasmic division)
  4. 4. Shoot Apical Meristem
  5. 5. Root Apical Meristem <ul><li>Root cap initials </li></ul><ul><li>Protoderm </li></ul><ul><li>Ground meristem </li></ul><ul><li>Procambium </li></ul><ul><li>Root cap </li></ul>
  6. 6. Lateral Meristems – secondary growth in woody plants Basswood – root in cross section Basswood – stem in cross section; 1, 2, 3 year old stems
  7. 7. Simple Tissues – consisting of one cell type <ul><li>Parenchyma – thin walled & alive at maturity; often multifaceted. </li></ul><ul><li>Collenchyma – thick walled & alive at maturity </li></ul><ul><li>Sclerenchyma – thick walled and dead at maturity </li></ul><ul><ul><li>Sclerids or stone cells – cells as long as they are wide </li></ul></ul><ul><ul><li>Fibers – cells longer than they are wide </li></ul></ul><ul><li>Epidermis – alive at maturity </li></ul><ul><ul><li>Trichomes – “pubescence” or hairs on epidermis </li></ul></ul><ul><ul><li>Root Hairs – tubular extensions of epidermal cells </li></ul></ul>
  8. 8. Parenchyma
  9. 9. Collenchyma
  10. 10. Sclerenchyma Right-hand illustration modified from: Weier, Stocking & Barbour, 1974, Botany: An Introduction to Plant Biology, 5th Ed. SCLERIDS FIBERS
  11. 11. Epidermis – stoma, trichomes, & root hairs
  12. 12. Complex Tissue <ul><li>Xylem – water conducting tissue; parenchyma, fibers, vessels and/or tracheids, and ray cells. </li></ul><ul><li>Phloem food conducting tissue; sieve-tube members (no nucleus at maturity, cytoplasm present), companion cells, fibers, parenchyma, and ray cells.  In flowering plants, sieve-tube members and companion cells arise from the same mother cell.  </li></ul><ul><li>Periderm – protective covering; composed of cork and parenchyma. </li></ul><ul><li>. </li></ul>
  13. 13. Xylem
  14. 14. Phloem
  15. 15. Vascular Bundles with xylem & phloem Maize or Corn – vein in cross section Alfalfa – vein in cross section