Basidiomycetes basidiospores sterigmata Basidium

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Basidiomycetes
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Clamp connections
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Fungi and Oomycetes Contrasted
Nuclei /cell Septum Nuclear
condition
Basidiomycetes 2 closed
haploidAscomycetes many open
haploidZygomycetes many none haploid
Oomycetes many none diploid
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Mushrooms
Members of Basidiomycetes
Basidiocarps fruiting bodies that bear the
basidia
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Oyster mushrooms (Pleurotus spp.)
Hallucinogenic Amanita spp.
Edible
Poisonous
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Basidia with basidiospores can be seen from gills
of mushrooms
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Puffballs
Earthstars
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Puccinia graminis
f. sp. triticiAgrios 565-571

• Stem rust of small grains
• Uredium on grass
• Aecium on barberry
• Puccinia graminis f.sp. hordei (barley)

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Barberry Alternate Host to Puccinia graminis

• Common shrub
• Introduced from Europe

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Barberry Infection
Spermogonium
Cross secction of leaf
Aecium Aeciospores (n n)
From The Fifth Kingdom Online
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Spermogonium Spermatia Receptive hyphae
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Aecium and aeciospores
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Uredia and Uredospores
From The Fifth Kingdom Online
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From Tom Volk webpage
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2 - celled Teliospores of Puccinia graminis
From The Fifth Kingdom Online
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Rust Reproductive Structures
No Yes No Yes Yes
Spore Sorus Infect HostTeliospore telium
Basidiospore basidium Spermatia spermogoniu
m Aeciospore aecium Uredospore uredium

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Puccinia pathway
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Soybean rust (www.sbrusa.net)Phakopsora
pachyrhizi (573)
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Rust spore movement with Hurricane IvanSeptember
16, 2004
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Predicted wind movement
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Cedar Apple Rust Gymnosporangium
juniperi-virginianaeG. globosum cedar
hawthorne rust
Apple host (Aecial stage)
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Cedar Apple RustTelial horns from gall on red
cedar
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IntroductionHost groups 9 species of white
pines native to North America, 1 species in WI
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IntroductionHost groups 50 species of Ribes
native to North America, 11 species in Wisconsin
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IntroductionEastern white pine, western white
pine, and sugar pine

• Valued by the forest products industry since the
  earliest settlers arrived

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White pine blister rust cycle
uredinium
do not overwinter
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Uredospores of Bean rust Uromyces appendiculatus
Uromyces appendiculatus uredospore germinating
ona bean leaf 5 h after inoculation
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