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Triodia smut

Scientific Name
Ustilago triodiae
Scientific Author
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
Ustilago triodiae on Triodia microstachya - BRIP 46638. Scale bar = 1 cm
Source
Roger Shivas DEEDI
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Diagnostic Images (3)
Diagnostic Notes
Sori in the floral stem and inflorescence, cylindrical, elongate, 200–300 mm long, 1–2 mm wide, sometimes with short adpressed branches on their distal part, the remnants of destroyed spikelets, at first covered by a silvery membrane of host origin which ruptures irregularly in several places and flakes away exposing the dark brown initially agglutinated, later powdery mass of spores.

Spores broadly ellipsoidal or ovoid, rarely subglobose, (8–) 9–12 × 7.0–10.5 µm, yellowish brown; wall c. 0.8 µm thick, moderately densely and uniformly verrucose-echinulate which just affects the spore profile.

Spore germination resulting in 1 (rarely 2) 2–3-celled rather variable basidia initiated from the same point, 8–30 (–35) × 2–4 µm. Basidiospores ovoid to ellipsoidal, several borne laterally and terminally, 4–10 × 1.5–2.5 µm, germinating successively, like yeast cells. Basal basidial cell often producing a long hypha 1.5–2.0 µm diam.
More Information
Specimen Contact
Roger Shivas
Author
Roger Shivas
Created
17/12/2010 01:00 AEST
Last Updated
17/12/2010 13:00 AEST
Citation
Roger Shivas (2010) Triodia smut (Ustilago triodiae) Updated on 12/17/2010 1:00:58 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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