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Schizachyium Smut

Scientific Name
Sporisorium absconditum
Scientific Author
Vánky
Taxonomy
Basidiomycota, Ustilaginomycetes, Ustilaginales, Ustilaginaceae
Status
Native Australian Species
Reliability
High
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Diagnostic Images (4)
Diagnostic Notes
Sori destroying the racemes, narrowly cylindrical, 15–30 mm long, 0.5–1.0 mm wide, almost completely hidden by the tubuliform spatheole, with only the tip of the sorus protruding, covered by a thin pale brown peridium that ruptures from its distal part to expose the black granular-powdery mass of spore balls and a long filiform columella. Frequently, all shoots of a plant are infected; occasionally an infected plant may have 1 or several flowering shoots.

Spore balls persistent, subglobose, ovoid, ellipsoidal or irregular, 50–100 × 50–80 µm, dark reddish brown, opaque, composed of tens of spores that separate by strong pressure.

Spores dimorphic. Outer spores subglobose, ellipsoidal to subpolyhedrally irregular, 10.5–13.5 × 8–12 µm, dark yellowish brown; wall uneven, alternating thin and thick, 0.5–2.0 µm, causing darker and lighter areas to be visible; free surface of the outer spores coarsely verrucose; spore profile serrulate on the free surface, smooth on the contact sides. Inner spores subpolyhedrally irregular, about the size of the outer spores, subhyaline to pale yellowish brown; wall thin, to c. 0.5 µm, smooth.

Sterile cells absent.
More Information
Specimen Contact
Roger Shivas
Author
Roger Shivas
Created
22/11/2010 11:50 AEST
Last Updated
22/11/2010 11:50 AEST
Citation
Roger Shivas (2010) Schizachyium Smut (Sporisorium absconditum) Updated on 11/22/2010 11:50:05 AM 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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