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Arthrinium

Scientific Name
Arthrinium
Scientific Author
Kunze
Taxonomy
(Ascomycota: Sordariomycetes: Sordariomycetidae: Apiosporaceae)
Pest Status
1 NZ - Non-regulated species
Status
0 NZ - Unknown
Reliability
High
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Diagnostic Notes
Disease

Sometimes seen on dead leaves or on leaf spots; in the latter case Arthrinium spp. are probably secondary invaders of damaged tissue. A. arundinis has been reported to cause kernel blight of barley.

Morphology

Conidiophores brown to dark brown, arising from hyphae or aggregated in a brown stroma, forming black sporodochia. Setae present or absent, brown, intermingled among conidiophores. Conidia aseptate, brown to dark brown, smooth to verruculose, of various sizes and shapes; globose, ellipsoidal, lenticular, angular, kidney-shaped, lobed or dentate in surface view, sometimes with a small basal scar; often lenticular in side view with a pale equatorial ridge (germ slit). Ascomata immersed, solitary or aggregated in rows, often subglobose, brown to dark brown; ostiole single, central. Asci 8-spored, unitunicate, thin-walled. Ascospores hyaline, smooth, bi- to tri-seriate, apiosporous and 1-septate near the lower end.

Notes

Crous & Groenewald (2013) reviewed the genus, provided a molecular phylogeny and described several new species. They also found that the presence or absence of stromata and setae were not characters that could be used to separate the genera Cordella and Pteroconium. Some of the new species are barely separable on morphological characters and a DNA sequence is necessary to distinguish many of the species.

More Information
Specimen Contact
Eric McKenzie
Author
McKenzie, E.
Created
11/07/2013 09:34 AEST
Last Updated
07/05/2014 23:40 AEST
Citation
McKenzie, E. (2013) Arthrinium (Arthrinium) Updated on 5/7/2014 11:40:09 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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