Uromyces clitoriae
| Uromyces clitoriae | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Uromyces clitoriae | ||||||||||||
| Arthur |
Uromyces clitoriae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the legume Clitoria mexicana . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Mexico .
features
Macroscopic features
Uromyces clitoriae can only be recognized with the naked eye from 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 clitoriae 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, on stems and on leaf spindles are cinnamon-brown. Their cinnamon-brown uredospores are 27–30 × 25–27 µm in size, mostly triangular, ovoid and spiky. The parts of the species growing underneath the leaves are black-brown, uncovered and powdery. The chestnut-brown teliospores are unicellular, usually spherical to ellipsoid, warty and usually 22–27 × 17–20 µm in size. Their stem is colorless and up to 40 µm long.
distribution
The known distribution area of Uromyces clitoriae is limited to central Mexico .
ecology
The host plant of Uromyces clitoriae is Clitoria mexicana . 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 .