Uredo wilsonii
| Uredo wilsonii | ||||||||||||
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| Scientific name | ||||||||||||
| Uredo wilsonii | ||||||||||||
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Uredo wilsonii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Gochnatia magna . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in the Caribbean and Central America . Since only its secondary crop shape is knownso far, it is classified in the genus Uredo .
features
Macroscopic features
Uredo wilsonii 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 Uredo wilsonii grows as with all Uredo intercellular types, and forms Saugfäden that grow into the storage tissue of the host. The spermogonia and aecia of the species are not known. The uredia of the fungus growing on the underside of the host leaves are cylindrical and chocolate-brown. Their approximately chestnut brown uredospores are 27–30 × 23–27 µm in size, spherical to broadly ellipsoidal and spiky. The parts of the species are unknown.
distribution
The known distribution area of Uredo wilsonii includes Mexico and the Bahamas .
ecology
The host plant of Uredo wilsonii is Gochnatia magna . 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 macrocyclical development cycle with Spermogonia, Aecien, Uredien and Telien. Due to the lack of aecia and spermogonia, it is not possible to determine whether it changes 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 .
- Arthur, Joseph Charles. New Species of Uredineae. IV. Bull. Torr. Bot. Club, 33: 27-34. Jan. 1906.