Uromyces danthoniae
| Uromyces danthoniae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces danthoniae | ||||||||||||
| McAlpine |
Uromyces danthoniae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass genus Danthonia . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in the Australian region.
features
Macroscopic features
Uromyces danthoniae can only be recognized with the naked eye by means of the spore beds protruding on the surface of the host. They grow in nests that appear as yellowish to brown spots and pustules on the leaf surfaces.
Microscopic features
The mycelium of Uromyces danthoniae grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The cup-shaped aecia of the species grow in groups and have 16 × 12 µm, almost spherical aeciospores. The orange-brown uredia of the fungus grow on the upper side of the host leaves. Its golden to cinnamon-brown uredospores are 24–30 × 22–26 µm in size, mostly broadly ellipsoidal and spiky. The parts of the species that grow on the upper side are black-brown, compact and uncovered early on. The chestnut-brown teliospores are unicellular, usually ovoid to broadly ellipsoid and 27–34 × 19–24 µm in size. Their stalk is yellowish and up to 100 µm long.
distribution
The known distribution area of Uromyces danthoniae Australia , Tasmania and New Zealand .
ecology
The host plants of Uromyces danthoniae are diverse Danthonia species for both haplonts and dikaryotes . The fungus feeds on the nutrients present in the storage tissue of the plants, its spore beds later break through the leaf surface and release spores. The species has a development cycle with spermogonia , Aecien, Uredien and Telien, but does not change host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .