FINAL 07 - Introduction to Fungi Flashcards
Are eukaryotic organisms that are nonmotile and has rigid cell walls
Fungi
Made up of unbranched polymer of β-1,4-linked N-acetylglucosamine (Components of fungi cell wall)
Chitin
Made up of glucose polymers (Components of fungi cell wall)
Glucans
Made up of polymers of mannose (Components of fungi cell wall)
Mannans
Found in dematiaceous fungi (Components of fungi cell wall)
Melanin
Are unicellular fungi that are nonfilamentous, with spherical/oval cells, and is facultatively anaerobic
Yeast
Are multicellular fungi that are filamentous
Mold
Refers to the body of mold that is formed by mycelium; composed of hyphae and spores
Thallus
Refers to a mass of intertwined hyphae found in the thallus (body) of mold
Mycelium
2 components of thallus (body) of mold (HS)
Hyphae, Spores
Long filaments of cells joined together (Components of thallus/body of mold)
Hyphae
Have cross-walls between uninucleated cells (Types of hyphae)
Septate hyphae
Have long continuous cells with many nuclei (Types of hyphae)
Coenocytic hyphae
Penetrate the supporting medium, anchor the colony, and absorb nutrients (Types of hyphae)
Vegetative/substrate hyphae
Project above the surface of the mycelium and bear reproductive spores (Types of hyphae)
Reproductive/aerial hyphae
Fungi that exhibit 2 forms of growth, either as mold or yeast; is temperature-dependent
Dimorphic fungi
At __________°C, dimorphic fungi is yeastlike; they reproduce by budding
37°C
At __________°C, dimorphic fungi is moldlike; they produce hyphae
25°C
Divide unevenly (Types of yeasts)
Budding yeasts
Are short chain of cells formed by buds that fail to detach themselves
Pseudohyphae
Divide evenly (Types of yeasts)
Fission yeasts
Spores formed from the hyphae of 1 parent organism via mitosis (Types of spores)
Asexual spores
2 types of asexual spores (CS)
Condiospore/Conidium, Sporangiospore
Spores not enclosed within a sac at the end of an aerial hyphae (Types of asexual spores)
Condiospore/Conidium
Spores enclosed within a sac at the end of an aerial hyphae (Types of asexual spores)
Sporangiospore
Spores formed from the fusion of nuclei of 2 opposite mating strains of the same species (Types of spores)
Sexual spores
3 phases of sexual reproduction of spores (PKM)
Plasmogamy, Karyogamy, Meiosis
A haploid nucleus of a donor cell penetrates the cytoplasm of a recipient cell (Phases of sexual reproduction of spores)
Plasmogamy
The donor and recipient cell nuclei fuse to form a diploid zygote nucleus (Phases of sexual reproduction of spores)
Karyogamy
The diploid nucleus gives rise to haploid nuclei (sexual spores), some of which may be genetic recombinants (Phases of sexual reproduction of spores)
Meiosis
Sexual stage (Fungal life cycle)
Teleomorph
Asexual stage (Fungal life cycle)
Anamorph
Whole fungus, including the anamorph and teleomorph (Fungal life cycle)
Holomorph
Has both sexual and asexual stage (Fungal life cycle)
Perfect fungi
Has asexual stage only; no sexual stage (Fungal life cycle)
Imperfect fungi
Refers to conjugation fungi; are saprophytic molds with coenocytic hyphae
Zygomycota
Sexual spores of zygomycota are called __________
Zygospores
Asexual spores of zygomycota are called __________
Sporangiospore
Zygomycota is now split into __________ and __________ (MZ)
Mucoromycota, Zoopagomycota
Are unusual eukaryotes because they lack mitochondria; they do not have microtubules and are obligate intracellular parasites
Microsporidia
Refers to sac fungi; are molds with septate hyphae and has the largest fungal division
Ascomycota
Sexual spores of ascomycota are called __________
Ascospores
Asexual spores of ascomycota are called __________
Conidiospores
Refers to club fungi; it includes mushrooms
Basidiomycota
Sexual spores of basidiomycota are called __________
Basidiospores
Asexual spores of basidiomycota are called __________
Conidiospores
Caused by ingestion of toxic mushroom (Fungal diseases)
Mycetismus
Caused by ingestion of fungal toxin produced by molds (Fungal diseases)
Mycotoxicosis
Characterized by rhinitis, bronchial asthma, alveolitis, and generalized pneumonitis; caused by fungal spores (Fungal diseases)
Hypersensitivity
Refers to fungal infection; may be superficial, cutaneous, subcutaneous, primary systemic, and opportunistic systemic (Fungal diseases)
Mycosis
Also known as fly agaric; causes mycetismus
Amanita muscaria
Also known as death cap; causes mycetismus
Amanita phalloides
Acquired from rye or other cereal grains; can restrict blood flow in the limbs (Examples of mycotoxicosis)
Ergot poisoning
Ergot poisoning is caused by __________
Claviceps purpurea
Aflatoxin poisoning is caused by __________
Aspergillus flavus
Acquired from peanuts; causes cirrhosis and cancer of the liver (Examples of mycotoxicosis)
Aflatoxin poisoning
Localized along hair shafts and in superficial epidermal cells (Types of mycoses)
Superficial mycoses
Keratinized tissues such as skin, hair, and nails; transmitted through direct contact (Types of mycoses)
Cutaneous mycoses
Tissues beneath the skin; transmitted through direct implantation of spores into a puncture wound in the skin (Types of mycoses)
Subcutaneous
Many organs deep within the body; transmitted through inhalation (Types of mycoses)
Primary systemic