Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation prepared by Christine L. Case Microbiology B.E Pruitt & Jane J. Stein AN INTRODUCTION EIGHTH EDITION TORTORA FUNKE CASE Chapter 12, part A The Eukaryotes: Fungi, Algae, Protozoa, and Helminths
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings The Fungi Eukaryotic Aerobic or facultatively anaerobic Chemoheterotrophic Most are decomposers Mycology is the study of fungi
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Mycology: The Study of Fungi Table 12.2
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Fungi Table 12.1
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings The fungal thallus consists of hyphae; a mass of hyphae is a mycelium. Molds Figure 12.2
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Unicellular fungi Fission yeasts divide symmetrically Budding yeasts divide asymmetrically Yeasts Figure 12.3
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Pathogenic dimorphic fungi are yeastlike at 37°C and moldlike at 25°C Dimorphism in the fungus Mucor indicus depends on CO2 concentration. On the agar surface, it exhibits yeastlike growth, but in agar it is moldlike. Dimorphism Figure 12.4
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Fungal Life Cycle Figure 12.7
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Systemic mycosesDeep within body Subcutaneous mycosesBeneath the skin Cutaneous mycosesAffect hair, skin, nails Superficial mycosesLocalized, e.g., hair shafts Opportunistic mycosesCaused by normal microbiota or fungi that are normally Fungal Diseases (mycoses)
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Sporangiospore Conidiospore Arthrospore Blastoconidium Chlamydospore Asexual spores Figure 12.1
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Conidiospores Figure 12.5
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
PlasmogamyHaploid donor cell nucleus (+) penetrates cytoplasm of recipient cell (–) Karyogamy+ and – nuclei fuse to form a diploid zygote nucleus. MeiosisDiploid nucleus produces haploid nuclei (sexual spores) Sexual reproduction
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Zygomycota ZygosporeFusion of haploid cells produces one zygospore Sexual spores Figure 12.6
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Ascomycota AscosporeFormed in a sac (ascus) Sexual spores Figure 12.7
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Basidiomycota BasidiosporeFormed externally on a pedestal (basidium) Sexual spores Figure 12.8