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Xerochloa smut

Scientific Name
Ustilago xerochloae
Scientific Author
Vánky & R.G. Shivas
Taxonomy
Basidiomycota, Ustilaginomycetes, Ustilaginales, Ustilaginaceae
Status
Native Australian Species
Reliability
High
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Diagnostic Images

Host symptoms
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Caption
Ustilago xerochloae on Xerochloa barbata - BRIP 27734. Scale bar = 5 mm
Source
Roger Shivas DEEDI
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Diagnostic Images (3)
Diagnostic Notes
Sori as globose elongate or irregular swellings on the upper part of the culms, at the nodes, and also in the spikelets of some of the unit inflorescences, 2–10 mm long, 2–4 mm wide, at first covered by a thin grey to yellowish brown peridium of host and fungus origin which ruptures irregularly exposing a blackish brown semi-agglutinated to powdery mass of spores.

Spores subglobose, broadly ellipsoidal, ovoid to subpolyhedrally irregular, 8.0–12.5 × 7.5–10.5 µm, yellowish to reddish brown; wall uniformly c. 0.8 µm thick, finely and moderately densely echinulate, in SEM very finely and densely verruculose between the 0.3–0.4 µm long spines. Fungal cells of the peridium globose, broadly ellipsoidal to subpolyhedrally irregular, 5–11 × 4–8 µm, hyaline; contents homogenous; wall thin, c. 0.5 µm, smooth.
More Information
Specimen Contact
Roger Shivas
Author
Roger Shivas
Created
17/12/2010 02:44 AEST
Last Updated
17/12/2010 14:44 AEST
Citation
Roger Shivas (2010) Xerochloa smut (Ustilago xerochloae) Updated on 12/17/2010 2:44:02 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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