Uromyces archerianus
| Uromyces archerianus | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces archerianus | ||||||||||||
| Arthur & Fromme |
Uromyces archerianus is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass genera Chloris and Enteropogon . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in America and Africa.
features
Macroscopic features
Uromyces archerianus 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 archerianus 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 the underside of the host leaves. Its golden to cinnamon-brown uredospores are 23–27 × 22–26 µm in size, mostly spherical to broadly ellipsoidal and wrinkled and warty. The parts of the species are black-brown, compact and uncovered early. The chestnut-brown teliospores are unicellular, usually ovoid to spherical and 24–29 × 20–24 µm in size. Their stalk is yellowish and up to 120 µm long.
distribution
The known distribution area of Uromyces archerianus includes North America from Mexico to the southern USA as well as Uganda , South Africa and Tanzania . Finds have also been reported from Australia.
ecology
The host plants of Uromyces archerianus are Chloris breviseta , C. virgata and Enteropogon monostachya . 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 .
Individual evidence
- ↑ GBIF Portal, accessed on January 12, 2013 ( Memento of the original from March 4, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
