Uromyces amoenus
| Uromyces amoenus | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces amoenus | ||||||||||||
| Syd. & P. Syd. |
Uromyces amoenus is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Anaphalis margaritacea . 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 amoenus 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 amoenus grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia and aecia of the species are unknown. The same applies to their uredia , they may not be trained. The parts of the species growing on the underside of the surfaces of the host leaves are black-brown, densely grouped, confluent and uncovered. The clear chestnut to golden brown teliospores are unicellular, usually broadly ovate to spherical, warty and mostly 22–28 × 16–21 µm in size. Their stalk is brownish and up to 60 µm long.
distribution
The known distribution area of Uromyces amoenus extends from British Columbia to California and Wyoming .
ecology
The host plant of Uromyces amoenus is Anaphalis margaritacea . 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 probably microcyclical development cycle , of which only the telia and their host are known so far. It cannot therefore be said whether she will 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 .