Uromyces coloradensis
| Uromyces coloradensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces coloradensis | ||||||||||||
| Ellis & Everh. |
Uromyces coloradensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the legume genus Vicia . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in western North America .
features
Macroscopic features
Uromyces coloradensis 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 coloradensis grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your spermogonia grow on both sides or predominantly on the underside of the host leaves. The aecia of the species growing between them are whitish and later yellow. Their hyaline aeciospores are 21–26 × 17–19 µm in size, spherical to broadly ellipsoidal and warty. The fungus apparently does not develop uredia . The bilateral growing parts of the species are cinnamon brown, powdery and uncovered. The golden to light chestnut brown teliospores are unicellular, usually ovate to long ellipsoid, warty and usually 22–30 × 17–19 µm in size. Their stem is colorless.
distribution
The known distribution area of Uromyces coloradensis extends from British Columbia and Alberta to New Mexico and California .
ecology
The host plants of Uromyces coloradensis are diverse Vicia species. 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 microcyclic development cycle with spermogonia, aecia and telia. As a heterosexual 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 .