Uromyces hedysari-paniculati
| Uromyces hedysari-paniculati | ||||||||||||
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| Uromyces hedysari-paniculati | ||||||||||||
| ( Pig. ) Farl. |
Uromyces Hedysari-paniculati is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the legume genus Desmodium . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in much of America.
features
Macroscopic features
Uromyces hedysari-paniculati 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 Hedysari-paniculati grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow on the upper side in small groups on the host leaves. The aecia of the species growing underneath the leaves are whitish and cup-shaped. Their hyaline aeciospores are 22–23 × 21–24 µm in size, spherical and warty. The uredia of the fungus growing underneath the leaves are cinnamon-brown and have colorless paraphyses. The golden-brown uredospores are 21–25 × 17–20 µm in size, broadly ellipsoidal and spiky. The predominantly underside of the leaf growing parts of the species are black-brown, powdery and uncovered. The chestnut-brown teliospores are unicellular, usually ellipsoidal to broadly ellipsoidal, smooth and mostly 22–30 × 17–21 µm in size. Their stem is colorless and up to 60 µm long.
distribution
The known distribution area of Uromyces hedysari-paniculati extends from Ontario to South America .
ecology
The host plants of Uromyces hedysari-paniculati are different species of Desmodium . 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 macrocyclical development cycle with Spermogonia, Aecien, Telien and Uredien. As an auto-ecologic parasite, it does not change host .
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .
Individual evidence
- ^ DF Farr, AY Rossman: Uromyces hedysari-paniculati. (No longer available online.) In: Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. Archived from the original on December 18, 2016 ; Retrieved May 17, 2013 . 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.
