Uromyces ervi
| Uromyces ervi | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces ervi | ||||||||||||
| ( Wallr. ) Westend. |
Uromyces ervi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of vetches . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It iswidespread in the Holarctic .
features
Macroscopic features
Uromyces ervi 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 ervi 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 underside of the leaves in groups around the spermogonia or individually growing aecia of the species are short and cup-shaped. Their yellowish aeciospores are 18–22 × 15–19 µm in size, spherical and warty. The uredia of the mushroom, growing on both sides of the petioles and stems, are light cinnamon brown and rare. The yellowish to golden uredospores are 23–26 × 19–22 µm in size, ovate to broadly ellipsoidal and spiky. The parts of the species growing on petioles and stems are black-brown, compact, confluent and uncovered. The chestnut-brown teliospores are unicellular, usually ovoid to long ellipsoid, smooth and mostly 22–30 × 17–21 µm in size. Their stem is colorless and up to 80 µm long.
distribution
The known distribution area of Uromyces ervi extends from Nova Scotia to Europe .
ecology
The host plant of Uromyces ervi is vetch ( Vicia spp.). 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 ervi. (No longer available online.) In: Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. Archived from the original on March 4, 2016 ; Retrieved May 19, 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.
