Uromyces argutus
| Uromyces argutus | ||||||||||||
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| Uromyces argutus | ||||||||||||
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Uromyces argutus is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Spertina alterniflora . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in North America and Europe .
features
Macroscopic features
Uromyces argutus 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 argutus 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 yellow-brown uredia of the fungus grow on both sides of the host leaves. Their dirty brown to yellow uredospores are 26–32 × 20–23 µm in size, mostly long ellipsoidal to ellipsoidal and spiky. The bilateral growing parts of the species are black-brown, compact and early exposed. The golden to light chestnut brown teliospores are unicellular, usually ovoid to ellipsoid and 27–35 × 18–21 µm in size. Their stalk is yellowish and up to 70 µm long.
distribution
The known distribution area of Uromyces argutus includes Florida and France .
ecology
The host plant of Uromyces argutus is Spartina alterniflora . 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 et al. 1971, ISBN 3-540-05336-0 .