Uromyces trichoneurae
| Uromyces trichoneurae | ||||||||||||
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| Uromyces trichoneurae | ||||||||||||
| Doidge |
Uromyces trichoneurae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Trichoneura grandiglumis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to South Africa .
features
Macroscopic features
Uromyces trichoneurae 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 trichoneurae grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known. The cinnamon-brown uredia of the fungus grow on both sides of the host leaves. Their golden to cinnamon-brown uredospores are 24–30 × 19–23 µm in size, ovate to ellipsoidal and spiky. The bilateral growing parts of the species are black-brown, compact and slit-shaped exposed. The chestnut-brown teliospores are single-celled, angularly ovate and 22–29 × 18–20 µm in size. Their stalk is yellowish and up to 45 µm long.
distribution
The known distribution area of Uromyces trichoneurae only includes South Africa .
ecology
The host plant of Uromyces trichoneurae is Trichoneura grandiglumis . 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 of which only Telien and Uredien and their host are known; Spermogonia and aecia could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .