Uromyces seditiosus
| Uromyces seditiosus | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Uromyces seditiosus | ||||||||||||
| core |
Uromyces Seditiosus is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of plantains as well as of Aristida - sweet grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in North America .
features
Macroscopic features
Uromyces seditiosus 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 Seditiosus grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species have 18–24 × 16–19 µm large, hyaline aeciospores with a warty surface. The golden-brown uredia of the fungus grow on the upper side of the host's leaves and sheaths. Their light cinnamon to golden brown uredospores are 22–26 × 18–26 µm in size, mostly spherical to pressed spherical and spiky. The parts of the species that grow on the upper side are black-brown, compact and uncovered early on. The golden to chestnut brown teliospores are unicellular, usually broadly ovate to elongated and 26–40 × 16–25 µm in size. Their stalk is yellowish and up to 100 µm long.
distribution
The known distribution area of Uromyces seditiosus includes the USA east of the Rocky Mountains .
ecology
The host plants of Uromyces seditiosus are for the haplonten plantain ( Plantago spp.) And possibly also houstonia ( Houstonia ) as well as Aristida species for the dikaryote . 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 with spermogonia, Aecien, Telien and Uredien and completes a host change .
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .