Uromyces indigoferae
| Uromyces indigoferae | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Uromyces indigoferae | ||||||||||||
| Dietel & Holw. |
Uromyces indigoferae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the legume genus Indigofera . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in tropical and subtropical America.
features
Macroscopic features
Uromyces indigoferae 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 indigoferae 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 both sides of the surfaces of the host leaves are cinnamon brown. Their golden to cinnamon-brown uredospores are 23–28 × 18–20 µm in size, mostly ellipsoidal to broadly ellipsoidal and spiky. The parts of the species growing on both sides and on stems are black-brown, compact and uncovered. The chestnut-brown teliospores are unicellular, usually ovate to broadly ellipsoidal, warty and mostly 25-30 × 17-21 µm in size. Their stem is colorless and up to 100 µm long.
distribution
The known distribution area of Uromyces indigoferae extends from Florida and Texas to South America .
ecology
The host plants of Uromyces indigoferae are different Indigofera species. 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 .