Uromyces hyalinus
| Uromyces hyalinus | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces hyalinus | ||||||||||||
| Peck |
Uromyces hyalinus is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the legume genus Sophora . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is spread all over the world.
features
Macroscopic features
Uromyces hyalinus 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 hyalinus 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 of the host leaves. The aecia of the species, mostly growing underneath the leaves, are light cinnamon brown. Their golden-brown aeciospores are 25–30 × 20–24 µm in size, ovate to ellipsoidal and spiky. Uredia are absent from the species or cannot be distinguished from Aecia. The parts of the species growing underneath the leaves are dark cinnamon to chestnut brown, powdery and uncovered. The dark golden brown teliospores are unicellular, usually ovoid to ellipsoid, smooth and mostly 22–30 × 16–19 µm in size. Their stem is colorless.
distribution
The known distribution area of Uromyces hyalinus extends from South Dakota and Wyoming to Chihuahua .
ecology
The host plants of Uromyces hyalinus are the legumes Sophora sericea and S. stenophylla . 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 microcyclical development cycle with spermogonia, aecia, telia and uredia. 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 .