Puccinia praemorsa
| Puccinia praemorsa | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia praemorsa | ||||||||||||
| Dietel & Holway |
Puccinia praemorsa is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Brickellia veronicaefolia . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Mexico .
features
Macroscopic features
Puccinia praemorsa can only be recognized with the naked eye from 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 praemorsa 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 parts of the species growing on the underside of the host leaves are chocolate-brown, compact and uncovered, they are in circular groups. The yellowish to chestnut brown teliospores are two-celled, usually club-shaped to lamely and 50–70 × 20–27 µm in size. Their stem is yellow to yellow-brown and up to 30 µm long.
distribution
The known distribution area of Puccinia praemorsa only includes Mexico .
ecology
The host plant of Puccinia praemorsa is Brickellia veronicaefolia . 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 .