Lecture Examination Botany 359, Fall, 1998 Name____________________________________

  1. Complete the following Diagrams:
    1. An erumpent multiloculate ascotroma with biseriate, phaeodidymospores in a bitunicate ascus.

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    2. In the space provided diagram the ascus of the following taxa

 

Erysiphales

Hyaloscyphaceae

Chaetomiaceae

Tuberaceae

Geoglossaceae

  1. On the accompanying vocabulary list, place a F next the terms that characterize the fungi in general
  2. In nature you find four different fungal structures, each with a terminally located, round "head" and each with a stalk; all five structures are identical in size. Using observations with your eye, with the aid of a hand lens, with the aid of a dissecting microscope, and with the aid of a compound microscope, you determine that the four structures can be identified as a:
      1. mazaedium;
      2. synnema;
      3. stipitate, capitate apothecium;
      4. stipitate, capitate stroma.

IN A LOGICAL AND ORGANIZED FASHION, how were you able to make this determination?

 

 

 

 

 

 

 

 

 

IV. Compare (give the similarities) and Contrast (give the differences) Questions. You are to do 3 of the 4. If you choose to do 4 of the 4, the lowest points you earn on the 4 will be counted as extra points.
    1. paraphysis, pseudoparaphysis, apical paraphysis, and periphysis

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    2. an operculate ascus with an inoperculate ascus

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    3. Erysiphales with the Eurotiales

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    4. MAT locus with HET locus

 

 

 

 

 

 

 

V. Definitions (select from the sheet containing the terms, the term that best fits the defintiion)

  1. _____________________the totality of structures enclosed by the ascocarp wall
  2. _____________________a compact somatic structure on which or in which fruiting bodies are usually formed
  3. _____________________a condition in which genetically different nuclei are associated in the same protoplast or the same mycelium
  4. _____________________a specialized dikaryotic hypha that gives rise to one or more asci
  5. _____________________an elongated, boat-shaped ascocarp with a longitudinal slit
  6. _____________________an elongated, needle- or worm-like spore
  7. _____________________the production of a new cell from a small outgrowth or protrusion from the mother cell (as in yeasts)
  8. _____________________a condition that requires two mycelia to complete sexual reproduction
  9. _____________________the term that refers to the entire asexual stage in the life cycle of a pleomorphic fungus
  10. _____________________an electron-dense, spherical body found in the hyphae of Ascomycota and usually concentrated near septa.

VI. Diagram the life cycle of a typical discomycete by arranging the following words into a life cycle. Please use numbers rather than the terms.
  1. a post-meiotic mitosis
  2. Antheridium
  3. Ascogenous hyphae
  4. Ascogonium with trichogyne
  5. Ascospore (-)
  6. Ascospore (+)
  7. ascospore discharge
  8. ascospore dispersal.
  9. Ascospore formation
  10. Attraction of antheridium to trichogyne
  11. Condium (+)
  12. Conidiogenesis cell
  13. Crozier
  14. gametangial fusion
  15. Hypha (-)
  16. Hypha (+)
  17. Karyogamy in pentultimate cell
  18. Meiosis
  19. mitosis
  20. Movement of paired nuclei into ascogenous hyphae
  21. Mycelium (-)
  22. Mycelium (+)
  23. Plasmogamy with pairing of nucleus in ascogonium
  24. Synchronous mitosis of dikaryotic hyphae in ascogenous hyphae with septum formation
  25. Synchronous mitosis of dikaryotic nuclei in ascogonium
  26. the EMS (envelope membrane system) forms the wall of each ascospore

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VII. Provide an explanation in a diagram of the ploidy number and origin of the paraphyses, hymenium, antheridium and ascogonium, ascogenous hyphae, and ascocarp wall of a fungus in the Discomycetes