Uromyces aeluropodis repentis
| Uromyces aeluropodis repentis | ||||||||||||
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| Uromyces aeluropodis repentis | ||||||||||||
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Uromyces aeluropodis-repentis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grasses Aeluropus littoralis and Aeluropus repens . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in the southwestern Palearctic .
features
Macroscopic features
Uromyces aeluropodis-repentis can only be recognized with the naked eye by 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 aeluropodis-repentis grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia and aecia of the species are not known. The cinnamon-brown uredia of the fungus grow on both sides of the host leaves. Its golden-brown uredospores are 26–30 × 22–26 µm in size, mostly spherical to almost spherical and finely warty. The parts of the species growing on leaves, fescue and ducts are blackish, compact and uncovered early. The chestnut-brown teliospores are unicellular, usually ovoid to ellipsoid and 30–40 × 20–26 µm in size. The stem is colorless to yellowish and up to 115 µm long.
distribution
The known distribution area of Uromyces aeluropodis-repentis extends from the Russian Black Sea coast to the Mediterranean .
ecology
The host plants of Uromyces aeluropodis repentis are Aeluropus littoralis and A. repens . 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 goes through a development cycle of which only Telien and Uredien and their host are known; Spermogonia and Aecien could not be assigned to her.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .