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Schizachyrium smut

Scientific Name
Sporisorium blakeanum
Scientific Author
Vánky
Taxonomy
Basidiomycota, Ustilaginomycetes, Ustilaginales, Ustilaginaceae
Status
Native Australian Species
Reliability
High
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Diagnostic Images

Light micrograph
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Caption
Sporisorium blakeanum on Schizachyrium fragile - BRIP 7804. Scale bar = 10 µm
Source
Roger Shivas DEEDI
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Diagnostic Images (3)
Diagnostic Notes
Sori destroying destroying the racemes, fusiform, 15–25 mm long, 0.5–1.5 mm wide, completely hidden by the tubuliform spatheole and also covered by a rather thick yellowish brown peridium on which numerous short or long fissures appear. Inside the spatheole and within the irregularly opened peridium, there is a black granular-powdery mass of spore balls and a long filiform columella.

Spore balls rather regular, globose, subglobose, ovoid, ellipsoidal, rarely slightly irregular, 50–90 × (40–) 50–70 (–90) µm, reddish brown, composed of a few tens of spores that separate by hard pressure.

Spores dimorphic. Outer spores rounded to subpolyhedrally irregular, 15–20 (–21.5) × 11.0–18.5 µm, medium reddish brown, with several large distinct irregular yellowish brown spots due to the irregularly thickened wall [0.5–2.0 (–2.5) µm thick], thickest at the angles; free surface of the outer spores c. 1.5 µm thick, including the blunt 0.5–0.8 µm high spines that, in surface view, appear as sparsely to moderately dense irregular warts; spore profile finely serrulate. Inner spores rounded, subpolyhedrally irregular, c. the size of the outer spores, subhyaline or yellowish brown-tinted; wall even to slightly uneven, 1.5–4.0 µm thick; contents finely granular.

Sterile cells absent.
More Information
Specimen Contact
Roger Shivas
Author
Roger Shivas
Created
22/11/2010 02:00 AEST
Last Updated
23/11/2010 15:17 AEST
Citation
Roger Shivas (2010) Schizachyrium smut (Sporisorium blakeanum) Updated on 11/23/2010 3:17:31 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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