Uromyces cologaniae
| Uromyces cologaniae | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces cologaniae | ||||||||||||
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Uromyces cologaniae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the legume genus Cologania . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Central America and the Caribbean .
features
Macroscopic features
Uromyces cologaniae 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 cologaniae 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 uredia of the fungus growing on the underside of the host leaves are yellow-brown. Their golden uredospores are 20–24 × 17–20 µm in size, mostly ovate to broadly ellipsoidal and spiky. The parts of the species growing underneath the leaves are cinnamon brown, uncovered and powdery. The cinnamon to light chestnut brown teliospores are unicellular, usually spherical to broadly ellipsoid, warty and usually 18–23 × 15–19 µm in size. Their stem is colorless.
distribution
The known distribution area of Uromyces cologaniae includes Central America from Mexico to Costa Rica and the Caribbean .
ecology
The host plants of Uromyces cologaniae are different species of Cologania . 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 macrocyclical development cycle of which only uredia and 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 .