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Stramenopiles

Stramenopiles. Photosynthetic Stramenopiles (Ochrophytes). Chrysophyceans (Golden Brown). Synurophyceans (Silica-Scaled Algae). Phaeophyceans (Brown Algae, Kelp, Rockweeds). Tribophyceans (Yellow-Green). Bacillariophyceans (Diatoms). Brown Algae (Phaeophycean) Diversity. Elachista.

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Stramenopiles

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  1. Stramenopiles

  2. Photosynthetic Stramenopiles (Ochrophytes) Chrysophyceans (Golden Brown) Synurophyceans (Silica-Scaled Algae) Phaeophyceans (Brown Algae, Kelp, Rockweeds) Tribophyceans (Yellow-Green) Bacillariophyceans (Diatoms)

  3. Brown Algae (Phaeophycean) Diversity Elachista Ectocarpus

  4. Brown Algae Diversity Hormosira Scytosiphon

  5. Brown Algae Diversity Fucus

  6. Brown Algae Diversity Nereocystis

  7. Brown Algae Diversity Streblonema Infected Macrocystis

  8. Sexual Life Cycles I: Isomorphic Alternation of Generations Sporophyte (2n) Scytosiphon Ectocarpus Gametophyte (n)

  9. Sexual Life Cycles II: Heteromorphic Alternation of Generations Sporophyte (2n) Nereocystis Laminaria Sargassum Macrocystis (Kelp) Gametophyte (n)

  10. Sexual Life Cycles III: Diplontic (2n) Fucus (Rockweed) (1n)

  11. Asexual Reproduction (2n) Ectocarpus (1n)

  12. Brown Algae Ecological Significance Productivity: Up to 1 kg C / m2 / y (Graham et al. 2008)

  13. Brown Algae Ecological Significance 10

  14. Brown Algae Viewing Sites Point Lobos State Preserve, CA (just south of Monterrey CA)

  15. Brown Algae Viewing Sites

  16. Brown Algae Economic Significance

  17. Brown Algae Economic Significance Alginate

  18. Growth Patterns: Diffuse (Non-Localized) Growth Chorda filum Fig. 14.19 in Graham et al. 2008

  19. Growth Patterns: Apical Cell (Filamentous)

  20. Growth Patterns: Apical Cell (Filament Bundles = Pseudoparenchyma) Desmarestia

  21. Growth Patterns: Apical Meristem (Apical Meristem - Parenchyma)

  22. Growth Patterns: Lateral Growth (Meristoderm)

  23. Brown Algal Tissue Differentiation: Epidermis, Cortex and Medulla Laminaria Figs. 17.15 in Lee 1999

  24. Brown Algae Sugar Conducting Cells: (Trumpet Hyphae) Figs. 14.45, 14.46 in Graham et al. 2008

  25. Brown Algae Organ Differentiation (Holdfast, Stipe, Blade)

  26. Brown Algae Organ Differentiation (Pneumatocysts= Bladders) Macrocystis Nereocystis Sargassum

  27. Brown Algae Organ Differentiation 7

  28. Brown Algal Cell Structure

  29. Cell Structure: Cell Wall 1

  30. Brown Algal Cell Wall Characteristics: Plasmodesmata

  31. Cell Wall Components I: Alginate Mg2+ K+ Ca2+ Na+ Alginate

  32. Cell Wall Components II: 3

  33. Cell Wall Components I: Sulphated Polysaccharides

  34. Brown Algae Herbivore Defenses: Physodes (Containing Tannins) 21

  35. Brown Algae Plastids (PER) Fig. 12.5 in Graham et al. 2008

  36. Brown Algae Plastids (PER) Plastid Membranes Fig. 12.5 in Graham et al. 2008

  37. Brown Algae Pigments I

  38. Brown Algae Pigments II Beta-Carotene Fucoxanthin 6

  39. Brown Algae Plastid: Pyrenoid 8

  40. Brown Algae Storage Product: Laminarin Beta (1 – 3) Linkages

  41. Brown Algae Cell Division

  42. Brown Algal Cell Division (2n) Ectocarpus (1n)

  43. Brown Algae Semi-Closed Mitosis

  44. Brown Algal Cell Division: Cytokinesis

  45. Brown Algal Life Cycles Sporophyte (2n) Gametophyte (n) X

  46. Isomorphic Alternation of Generations (Ectocarpus) Gametophyte (n) Sporophyte (2n) Spore (n) Zygote (2n) Gametes (n) Fig. 14.23 in Graham et al. 2008

  47. Gametophyte Unilocular Sporangium 11 Ectocarpus Sporophyte Pleurilocular Gametangium 12

  48. Male Gametangium Female Gametangium Pheromone (= Sex Hormone) (e.g., Ectocarpene)

  49. Ectocarpus: Asexual Reproduction

  50. Ectocarpus Summary Gametophyte (1n) Sporophyte (2n)

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