Uromyces halstedii
| Uromyces halstedii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces halstedii | ||||||||||||
| de Toni |
Uromyces halstedii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite of Trillium and of Brachyelytrum - and Leersia - 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 East Asia and North America .
features
Macroscopic features
Uromyces halstedii 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 halstedii grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The cylindrical aecia of the species have 20–24 × 19–22 µm large, hyaline aeciospores with a warty surface. The yellow-brown uredia of the fungus grow on both sides of the host leaves and have cephalic paraphyses. Their yellowish to cinnamon-brown uredospores are 22–26 × 16–21 µm in size, ovate to broadly ellipsoidal and spiky. The bilateral growing parts of the species are black-brown, powdery, compact and exposed early. The dark golden to chestnut brown teliospores are unicellular, mostly wedge-shaped, fingered at the tip and 24–30 × 15–24 µm in size. Their stalk is brown and up to 50 µm long.
distribution
The known distribution area of Uromyces halstedii includes Japan , the USA and Canada .
ecology
The host plants of Uromyces halstedii are for the Haplont wood lilies ( Trillium spp.) And Brachyelytrum erectum , Leersia oryzoides , L. sayanuka and L. virginica for the dicaryote . 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 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 .
Individual evidence
- ↑ GBIF Portal: Ocurrence search: accessed on December 26, 2012 ( 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.
