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Dichanthium Smut

Scientific Name
Jamesdicksonia brunkii
Scientific Author
(Ellis & Galloway) J. Walker & R.G. Shivas
Taxonomy
Basidiomycota, Exobasidiomycetes, Georgefischeriales, Georgefischeriaceae
Status
Native Australian Species
Reliability
High
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Diagnostic Images (4)
Diagnostic Notes
Sori on adaxial surface of leaf sheaths, forming striae fusing into a blackish brown agglutinated to granular-powdery coat of spore masses, showing through the outer surface of the leaf sheaths between the veins as pale lead-coloured striae of varying length.

Spores globose, subglobose to ovoid (subpolyhedrally irregular in some specimens), 10–20 (–24) × 10–18 µm, yellow to dark reddish brown; wall 3–8 µm thick, consisting of a homogenous endospore 1–2 µm thick and a smooth multilayered exospore, sometimes with a short hyaline papilla. [Spore measurements made in unheated lactophenol; in heated lactophenol or in water the spore wall and the spores swell considerably.]

Spore germination resulting in holobasidia producing 4–8 apical allantoid to fusiform symmetrical septate basidiospores that do not fuse but germinate apically to produce ballistoconidia. Asymmetrical ballisto-basidiospores also produced on basidial sterigmata.
More Information
Specimen Contact
Roger Shivas
Author
Roger Shivas
Created
02/12/2010 05:59 AEST
Last Updated
02/12/2010 17:59 AEST
Citation
Roger Shivas (2010) Dichanthium Smut (Jamesdicksonia brunkii) Updated on 12/2/2010 5:59:41 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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