1. The Eukaryotes: Fungi, Algae, Protozoa, and Helminths
Chapter 12, part A
The Eukaryotes: Fungi, Algae, Protozoa, and Helminths

2. Fungi, Algae, Protozoa and Helminths
Table 12.1

3. The Fungi Eukaryotic Aerobic or facultatively anaerobic
Chemoheterotrophic
Most are decomposers
Mycology is the study of fungi
Live as unicellular yeast and/or molds

4. Mycology: The Study of Fungi
Table 12.2

5. Fungus

6. Molds Formed by filaments of hyphae. A mass of hyphae is mycelium.
The fungal thallus is a body of hyphae.
Maybe septate or aseptate
Figure 12.2

7. Yeasts Unicellular fungi Budding yeasts divide asymmetrically
May form short hyphae called pseudohyphae
Figure 12.3

8. Dimorphism
Pathogenic dimorphic fungi are yeastlike at 37°C and moldlike at 25°C
Figure 12.4

9. Fungal Life Cycle
Figure 12.7

10. Asexual spores Sporangiospores Enclosed in sporangium Sporangiophore
Holds up the sporangium
Chlamydospore - thickened
Conidiospore
(free not enclosed)
Arthrospore - joint
Blastoconidium - budding
Figure 12.1

11. Conidiospores
Figure 12.5

12. Sexual reproduction
Plasmogamy Haploid donor cell nucleus (+) penetrates cytoplasm of recipient cell (–)
Karyogamy + and – nuclei fuse
Meiosis Diploid nucleus produces haploid nuclei (sexual spores)

13. Sexual spores Zygospore Fusion of haploid cells produces one zygospore
Figure 12.6

14. Sexual spores
Ascospore Formed in a sac (ascus)
Figure 12.7

15. Sexual spores Basidiospore Formed externally on a pedestal (basidium)
Figure 12.8