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Sugarcane smut

Scientific Name
Ustilago scitaminea
Scientific Author
Syd.
Taxonomy
Basidiomycota, Ustilaginomycetes, Ustilaginales, Ustilaginaceae
Status
Exotic establishment in Australia
Reliability
High
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Diagnostic Images (4)
Diagnostic Notes
Sori in floral stems that are transformed into long flagelliform often curved bodies; basal part of the sori concealed by leaf sheaths, distal part free and tapering, at first covered by a silvery peridium of host tissue which flakes away exposing the blackish brown dusty mass of spores mixed with irregular groups of sterile cells.

Spores globose, subglobose to subovoid, 6.5–8.0 (–10) × 5.5–7.5 µm, reddish brown; wall uniformly 0.5–0.8 µm thick, from ±smooth, finely and sparsely punctate-verruculose to sparsely or moderately densely echinulate.

Sterile cells larger than the spores (8–23 µm diam.), yellow or pale yellowish brown, smooth.

Spore germination resulting in 4-celled basidia (often of 3 + 1 pattern; the fourth basidial cell remaining within the spore) on which ovoid to long-ellipsoidal lateral and terminal basidiospores are produced. Basidiospores budding or fusing in pairs, giving rise to dikaryotic hyphae. Under natural conditions, on sugarcane (and on certain media), basidial cells conjugate and produce septate dikaryotic infection hyphae.
More Information
Specimen Contact
Roger Shivas
Author
Roger Shivas
Created
16/12/2010 02:06 AEST
Last Updated
16/12/2010 14:06 AEST
Citation
Roger Shivas (2010) Sugarcane smut (Ustilago scitaminea) Updated on 12/16/2010 2:06:07 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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