Uromyces clignyi
| Uromyces clignyi | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces clignyi | ||||||||||||
| Pat. & Har. |
Uromyces clignyi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Chlorophytum as well as of 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 warmer parts of the world.
features
Macroscopic features
Uromyces clignyi can only be recognized with the naked eye by 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 clignyi 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 20-25 × 18-20 µm large, hyaline aeciospores with a warty surface. The yellow-brown uredia of the fungus grow predominantly on the underside of the host leaves. Their yellow to golden brown uredospores are 22–28 × 19–25 µm in size, mostly broadly ellipsoidal and spiky. The parts of the species growing on both or mainly underside of the leaves are black-brown, powdery and uncovered, they usually have numerous paraphyses. The chestnut-brown teliospores are unicellular, usually spherical and 25–30 × 25–30 µm in size. Their stem is colorless and up to 110 µm long.
distribution
The known range of Uromyces clignyi was originally Ethiopia and now includes subtropical and tropical regions around the world.
ecology
The host plants of Uromyces clignyi are for the haplonts Chlorophytum and numerous different sweet grasses from the Andropogoneae tribe 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 .