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Aristida smut

Scientific Name
Sporisorium confusum
Scientific Author
(H.S. Jacks.) Vánky
Taxonomy
Basidiomycota, Ustilaginomycetes, Ustilaginales, Ustilaginaceae
Status
Native Australian Species
Reliability
High
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Diagnostic Images

Host symptoms
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Caption
Sporisorium confusum on Aristida queenslandica - BRIP 43707. Scale bar = 1 cm. Infected left; healthy right.
Source
Roger Shivas DEEDI
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Diagnostic Images (3)
Diagnostic Notes
Sori in the ovaries, elongate, with acute tips, 1.5–4.0 mm long, 0.5–1.5 mm wide, enclosed by the enveloping glumes, covered by the pericarp which ruptures at maturity exposing the blackish brown granular-powdery mass of spore balls.

Spore balls subglobose, ovoid, ellipsoidal, elongate or irregular, 40–100 × 30–70 µm, reddish brown, composed of 15–80 (or more?) spores that separate readily by pressure.

Spores slightly dimorphic, subpolyhedrally irregular, rarely ellipsoidal, 10–15 × 9.0–12.5 µm, yellowish brown; inner spores more angular, slightly paler; wall even or nearly so, 0.5–1.0 (–1.5) µm thick; inner spores sparsely, outer spores densely verrucose-echinulate, the warts up to 0.5 µm high; spore profile of the free surface finely serrulate.

Sterile cells absent.

Spore germination (after 24 hr on water-agar at room temperature) of Ustilago-type, with a septate basidium bearing lateral and terminal basidiospores and lateral hyphal branches.
More Information
Specimen Contact
Roger Shivas
Author
Roger Shivas
Created
22/11/2010 03:17 AEST
Last Updated
23/11/2010 15:23 AEST
Citation
Roger Shivas (2010) Aristida smut (Sporisorium confusum) Updated on 11/23/2010 3:23:24 PM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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