Chapter 31: Fungi Pt. 2 Flashcards
Name the 7 groups of Fungi
Cryptomycetes, Microsporidians, Chytrids, Zoopagomycetes, Mucoromycetes, Ascomycetes, and Basidiomycetes
Molds in this group include important decomposers
Mucoromycetes
Many others in Mucoromycetes live as ________, pathogens, or __________ with plants
Parasites, mutualisms
For Mucoromycetes, fusion between mycelia of different mating types (__________) produces a _____________
Plasmogamy; Zygosporangium
Nuclei fusion
Karyogamy
________ ________ and then meiosis occur within the Zygosporangium
Nuclei fusion
“Black bread mold”; is fairly typical of Mucoromycetes
Rhizopus stolonifer
_________ hyphae spread and penetrate the surface, absorbing nutrients from the rotting food
Coenocytic
_________ develop at the tips of upright hyphae, and asexually produce hundreds of air-dispersed spores
Sporangia
____________ are metabolically inactive and resistant to freezing and drying
Zygosporangia
Sporangium release genetically diverse ________ spores
Haploid
Some Mucoromycetes, such as __________, can “aim” and shoot their sporangia toward bright light
Pilobolus
Phylum Mucoromycota also includes an arbuscular mycorrhizae-forming clade of fungi called
Glomeromycetes
Phylum Ascomycota
Ascomycetes
Where do Ascomycetes live?
Variety of marine, freshwater, and terrestrial habitats
Vary in size and complexity from unicellular yeasts to elaborate cup fungi and morels
Ascomycetes
Often called “Sac fungi”, named for the saclike ______, in which spores are produced
Ascomycetes; asci
During the sexual stage, Ascomycetes produce fruiting bodies called
Ascocarps
Contain the spore-forming asci
Ascocarps
Include plant pathogens, decomposers, and symbionts
Ascomycetes
More than ____% of all Ascomycetes species form _________
25; lichens
Symbiotic associations with green algae or cyanobacteria
Lichens
Some form mycorrhizae with plants
Ascomycetes
What reproduce asexually by enormous numbers of asexual spores called _________
Ascomycetes; conidia
Produced by conidiophores
Conidia
Tips of specialized hyphae
Conidiophores
In sexual reproduction of Ascomycetes, _______ fuse with the ________ of a mycelium from a different mating type
Conidia; hyphae
In sexual reproduction of Ascomycetes, ________ cells are formed, each containing 2 haploid nuclei, one from each parent
Dikaryotic
Form at the tips of Dikaryotic hyphae in Ascomycetes sexual reproduction
Asci
__________ and _________ occur within the asci in Ascomycetes sexual reproduction
Karyogamy; meiosis
In sexual reproduction of Ascomycetes, ________ develop and are discharged from the ascocarp
Ascospores
Phylum Basidiomycota
Basidiomycetes
Include mushrooms, puffballs, and shelf fungi
Basidiomycetes
Some of this group are mutualisms that form mycorrhizae
Basidiomycetes
Others of Basidiomycetes are destructive plant parasites: ______ and _______
Rusts; smuts
The phylum Basidiomycetes is named for the _________
Basidium
A cell in which Karyogamy and meiosis occur
Basidium
In Basidiomycetes, gives rise to the common name of club fungus
The club-like shape of the basidium
Important decomposers of wood
Basidiomycetes
Are the best at decomposing lignin
Certain Basidiomycetes
A complex polymer abundant in wood
Lignin
The life cycle of Basidiomycete usually includes a long-lived __________ mycelium
Dikaryotic
In Basidiomycetes, the mycelium can reproduced sexually by producing fruiting bodies called
Basidiocarps
White mushrooms
Basidiocarps
Results from a concentrated growth of hyphae that forms from the Dikaryotic mycelium
Mushrooms
Supports and protects a large surface area of Dikaryotic basidia on gills
Cap of the mushroom
__________ occurs within the basidia, immediately followed by _______
Karyogamy; meiosis
Sexually produced _______ are ejected and dispersed by wind
Basidiospores
Some species of Basidiomycetes produce rings of mushrooms called “_______ ______” that may appear literally overnight
Fairy rings
Play key roles in nutrient cycling, ecological interactions, and human welfare
Fungi
Fungi interact with other organisms as ________, mutualisms, and ___________
Decomposers; pathogens
Fungi are efficient decomposers of organic material including ______ and ________
Cellulose; lignin
Together, _______ and ______ perform essential recycling of chemical elements between the living and nonliving world
Fungi; bacteria
Fungi form __________ relationship with _______, algae, _________, and animals
Mutualistic; plants; cyanobacteria
This type of fungi absorb nutrients from a host, but reciprocate with actions that benefit the host
Mutualistic fungi
All plant species harbor symbiotic __________, fungi (or bacteria) that live inside leaves or other plant parts without causing harm
Endophytes
Most endophytes are
Ascomycetes
Make toxins to defend the host plant; others help the plant tolerate heat, drought, or heavy metals
Endophytes
Some fungi share digestive services with ________
Animals
Help break down plant material in the guts of cattle and other grazing mammals
Fungi
Many species of _____ use the digestive power of fungi by raising them in “____”
Ants; farms
Are symbiotic associations between photosynthesis microorganisms and fungi
Lichens
Million of photosynthetic cells are held in a mass of _________ ________
Fungal hyphae
Grow on the surfaces of rocks, rotting logs, trees, and roofs and various forms
Lichens
The fungal partners of Lichens are most often _________
Ascomycetes
Photosynthetic partners of lichens are ________ or filamentous green algae or _____________
Unicellular; cyanobacteria
Gives a Lichen its overall shape and structure, and forms most of its mass
Fungus
Lichens reproduce asexually by ____________ or by formation of soredia
Fragmentation
Small clusters of hyphae with embedded algae
Soredia
Important pioneers on new rock and soil surfaces, such as volcanic flows or burned forests
Lichens
Physically penetrate the surface and break it down chemically; some also fix ________
Lichens; nitrogen
About ___% of known fungal species are parasites or pathogens, mostly on or in plants
30
_________ are much less susceptible to parasitic fungi than are plants
Animals
General term for fungal infection in animals
Mycosis
Skin mycosis in humans is
Ringworm