Puccinia redempta
Puccinia redempta | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Systematics | ||||||||||||
|
||||||||||||
Scientific name | ||||||||||||
Puccinia redempta | ||||||||||||
HSJackson |
Puccinia redempta is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Eupatorium hebebotryum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in Central America and the Caribbean .
features
Macroscopic features
Puccinia redempta 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 Puccinia redempta grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are unknown. The uredia of the fungus growing on the underside of the host leaves are cinnamon brown. Their yellow-brown uredospores are 25–32 × 25–28 µm in size, broadly ovate to almost spherical and spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered. The chestnut-brown teliospores are two-celled, usually angular, long-ellipsoidal and 47–55 × 32–39 µm in size. Their stem is colorless.
distribution
The known distribution area of Puccinia redempta includes central Mexico and the West Indies .
ecology
The host plant of Puccinia redempta is Eupatorium hebebotryum . 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 development cycle of which only Telien and Uredien and their host are known so far; Spermogonia and Aecien could not be assigned to her.
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .