Uromyces microchloae
| Uromyces microchloae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces microchloae | ||||||||||||
| Sydow & Sydow |
Uromyces microchloae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Microchloa setacea . Symptoms of infestation by the species are rust-colored spots and pustules on the leaf surfaces of the host plants. Uromyces microchloae is endemic to the Central African Republic .
features
Macroscopic features
Uromyces microchloae 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 microchloae 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 fungus. Its yellowish uredospores are 19–21 × 16–19 µm in size, usually ovate to broadly ellipsoidal and spiky. The parts of the species growing underneath the leaves are black-brown and uncovered early. The deep golden to light chestnut brown teliospores are unicellular, usually angular, spherical to elongated and 23-25 × 23-27 µm in size. Their stem is colorless and up to 30 µm long.
distribution
The known distribution area of Uromyces microchloae only includes the Central African Republic .
ecology
The host plant of Uromyces microchloae is Microchloa setacea . 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; So far, 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 , pp. 465 .