Puccinia dyssodiae
| Puccinia dyssodiae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia dyssodiae | ||||||||||||
| Cummins |
Puccinia dyssodiae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Dyssodia . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in southern North America .
features
Macroscopic features
Puccinia dyssodiae 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 Puccinia dyssodiae 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 same applies to the uredia of the fungus and their uredospores. The host on the leaves and growing -stängeln Telien the type are black brown, compact and uncovered. The chestnut-brown teliospores are two-celled, usually long club-shaped to long ellipsoid and 40–60 × 18–23 µm in size. Their stalk is 30–40 µm long.
distribution
The known distribution area of Puccinia dyssodiae includes Arizona and Nuevo León .
ecology
The host plants of Puccinia dyssodiae are Dyssodia greggii and D. pentachaeta . 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 their host are known; Uredien, 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 .