Uromyces phacae-frigidae
| Uromyces phacae-frigidae | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Uromyces phacae-frigidae | ||||||||||||
| ( Elections ) Har. |
Uromyces phacae-frigidae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the genus Astragalus . 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 phacae-frigidae 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 phacae-frigidae 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 grow systemically on the host plants. Their cinnamon to golden brown teliospores are unicellular, usually ovoid to broadly ellipsoid, warty and usually 24–28 × 19–22 µm in size. Their stem is brownish and up to 65 µm long.
distribution
The known distribution area of Uromyces phacae-frigidae includes the northern Holarctic .
ecology
The host plants of Uromyces phacae-frigidae are tragacanth species ( Astragalus 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 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 .