Uromyces muehlenbergiae
| Uromyces muehlenbergiae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces muehlenbergiae | ||||||||||||
| Ito |
Uromyces muehlenbergiae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grasses Muehlenbergia japonica and Muehlenbergia longistolon . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Japan .
features
Macroscopic features
Uromyces muehlenbergiae 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 muehlenbergiae 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 same applies to the uredia of the mushroom. Its dirty brown to yellowish uredospores are 18–23 × 17–20 µm in size, mostly spherical to broadly ellipsoidal and spiky. The parts of the species growing underneath the leaves are blackish, powdery and exposed early. The chestnut-brown teliospores are unicellular, usually spherical to ovoid and 22–27 × 16–18 µm in size. Their stalk is yellowish to brownish and up to 45 µm long.
distribution
The known distribution area of Uromyces muehlenbergiae only includes the Japanese Hokkaidō and the prefecture of Yamanashi .
ecology
The host plants of Uromyces muehlenbergiae are Muehlenbergia japonica and M. longistolon . 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 .
Individual evidence
- ↑ GBIF portal Ocurrence Search; accessed on January 1, 2013.