Uredo uromycoides
| Uredo uromycoides | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uredo uromycoides | ||||||||||||
| Spegazzini |
Uredo uromycoides is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Panicum phyllanthum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Argentina . Since only its secondary crop shape is knownso far, it is classified in the genus Uredo .
features
Macroscopic features
Uredo uromycoides can only be recognized with the naked eye from 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 Uredo uromycoides grows as with all Uredo intercellular types, and forms Saugfäden that grow into the storage tissue of the host. The spermogonia and aecia of the species are not known. The uredia of the fungus growing on both sides of the host leaves are cinnamon brown. Their cinnamon to chestnut brown uredospores are 25–28 × 21–24 µm in size, mostly spherical to ellipsoidal and spiky. The parts of the species are unknown.
distribution
The known distribution area of Uredo uromycoides only includes Argentina .
ecology
The host plant of Uredo uromycoides is Panicum phyllanthum . 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 presumably macrocyclical development cycle with Spermogonia, Aecien, Uredien and Telien. Due to the lack of aecia and spermogonia, it is not possible to determine whether it changes host .
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .