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Common Fungal Spores

Common Fungal Spores. Estelle Levetin, PhD. Fungal Spore Characteristics. Spore size Spore shape Number of cells Attachment Scars Wall characteristics Spore color. Spore Size, Shape, and Septation. SIZE : 2 m m to 100 mm

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Common Fungal Spores

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  1. Common Fungal Spores Estelle Levetin, PhD

  2. Fungal Spore Characteristics • Spore size • Spore shape • Number of cells • Attachment Scars • Wall characteristics • Spore color

  3. Spore Size, Shape, and Septation • SIZE: 2mm to 100 mm • SHAPE: Globose, elliptical, fusiform, asymmetric, lemon-shaped, barrel-shaped, curved • SEPTATION: Non-septate (one cell), single septum, transverse septa, transverse and longitudinal septa, random septa, pseudoseptate

  4. Other Characteristics • ATTACHMENTS: Attachment scars, attachment pegs • APPENDAGES • WALL CHARACTERISTICS: Smooth, granular, reticulate, spines, warts, wall thickness • COLOR: Hyaline (colorless) to deeply pigmented

  5. Spore color

  6. Asexual Spores Also known as Deuteromycetes, Fungi Imperfecti (imperfect fungi), or Mitospores

  7. Asexual Spores • Typically the most abundant spores in the atmosphere • Conidia often formed on specialized hyphae called conidiophores • Asexual stage of ascomycetes • Look for attachment scars where the spores were attached to the conidiophore

  8. Cladosporium

  9. Cladosporium Note the septum

  10. Several species of Cladosporium are common in the atmosphere

  11. Note the prominent attachment scars on Cladosporium conidia

  12. Alternaria

  13. Alternaria

  14. Curvularia

  15. Nigrospora Curvularia Drechslera

  16. Drechslera-type spores • Several genera of fungi have similar cylindrical spores • Drechslera • Bipolaris • Exserohilum • Helminthosporium

  17. Drechslera-type spores

  18. Pithomyces

  19. Note the colorless attachment at the base of Pithomyces spores

  20. Epicoccum

  21. Penicillium species • Produce distinctive conidiophores (spore bearing structures) • Spores are usually spherical to oval and form in chains

  22. Aspergillus species • Produce distinctive conidiophores (spore bearing structures) • Spores are usually spherical to oval and form in chains

  23. Penicillium-Aspergillus type spores

  24. Nigrospora Nigrospora Culture Air Sample

  25. Periconia

  26. Botrytis Cercospora Cladosporium

  27. Polythrincium Peronospora

  28. Oidium

  29. Tetraploa

  30. Torula

  31. Stemphylium

  32. Spegazzinia

  33. Fusarium

  34. Stachybotrys

  35. Division Ascomycota

  36. Ascospores are produced in an ascus. Eight ascospores are found in each ascus without any attachment scars

  37. Ascospores are sometimes found in groups of eight in air samples

  38. Leptosphaeria ascospores

  39. Chaetomium ascospores

  40. Pleospora ascospores

  41. Diatrypella ascospores

  42. Sporomiella ascospores

  43. Venturia ascospores

  44. Many ascospores on a rainy day

  45. Division Basidiomycota

  46. Basidiospore Basidium

  47. Ganoderma basidiospores

  48. Other basidiospores that are easy to recognize Coprinus Agrocybe - type

  49. Coprinus and Ganoderma basidiospores

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