Uromyces costaricensis
| Uromyces costaricensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces costaricensis | ||||||||||||
| Sydow & P. Sydow |
Uromyces costaricensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the genus Lasiacis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in much of America.
features
Macroscopic features
Uromyces costaricensis 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 costaricensis grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known. The yellow-brown uredia of the fungus grow on both sides of the host leaves. Their golden to almost cinnamon-brown uredospores are 24–29 × 20–23 µm in size, mostly egg-shaped and spiky. The bilateral growing parts of the species are chocolate brown and exposed. The golden to light chestnut brown teliospores are unicellular, usually narrowly ovate to ellipsoid and 24–30 × 14–28 µm in size. Their stalk is yellowish and up to 45 µm long.
distribution
The known distribution area of Uromyces costaricensis extends from Brazil through Central America and the Caribbean to the southern USA .
ecology
The host plants of Uromyces costaricensis are diverse Lasiacis 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 has a development cycle of which only Telien and Uredien and their host are known; Spermogonia and aecia could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .