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Chapter 3 Introduction to plant structure

Chapter 3 Introduction to plant structure

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Chapter 3 Introduction to plant structure

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  1. Chapter 3Introduction to plant structure

  2. Organization of the vascular plant body • Cells • Tissues • Organs • Meristems – meristematic cells, initials • Derivatives – differentiated, non-meristematic, specialized cells

  3. Cells • Meristems & growth • Apical meristems & primary growth • Lateral meristems & secondary growth

  4. Primary growth Figure 3.15

  5. Apical meristems • 3 primary meristems • Protoderm • Ground meristem • Procambium

  6. Lateral meristems • Secondary growth (woody plants) • Vascular cambium • Cork cambium

  7. Secondary growth & plant life cycles • Herbaceous plants vs. woody plants • Annuals, biennials, perennials

  8. Intercalary meristems • Stem elongation in grasses

  9. Organization of the vascular plant body • Cells • Tissues • Organs • Dermal • Ground • Vascular

  10. Dermal tissues • Epidermis

  11. Epidermis Cuticle

  12. Would you expect root epidermis to have cuticle?

  13. Epidermis Trichomes

  14. Epidermis

  15. Dermal tissues • Periderm

  16. Maple bark Cypress bark

  17. Periderm (bark) Oak bark Pine bark

  18. Dermal products

  19. Cuticle & Carnauba wax

  20. Trichomes & Terpenes • Lipid-based • Essential oils • Citronellol • Camphor • Mints (Mentha) • Menthol • Pyrethrins

  21. A terpene antimicrobial & anti-feedant

  22. Ground tissues • Parenchyma • Chlorenchyma

  23. Ground tissues • Sclerenchyma • Fibers • Sclereids

  24. Sclereids

  25. Sclerenchyma fibers

  26. Sclerenchyma fibers

  27. Important fiber crops • Hemp

  28. Important fiber crops • Flax (linen)

  29. Important fiber crops • Ramie

  30. Jute Bangladesh - #1 producer

  31. Ground tissues • Collenchyma

  32. Vascular tissues • Xylem • Phloem

  33. (EUDICOTS)

  34. Vascular tissues Vascular bundles in stems

  35. Dicot root, c.s. Xylem vessel Xylem tracheid Phloem

  36. Vascular tissue • Phloem Sieve tube Companion cell

  37. Vascular tissues • Longitudinal sections

  38. Cuticle is associated with which tissue(s)? • Epidermis • Sclerenchyma • Xylem • Ground tissue • All of these

  39. Photosynthesis primarily occurs in • Epidermis • Ground tissue • Phloem • Collenchyma • Vascular tissue

  40. Water transport is accomplished by • Dermal tissue • Ground tissue • Sclerenchyma fibers • Phloem • Vascular tissue