Puccinia conglomerata
Puccinia conglomerata | ||||||||||||
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Puccinia conglomerata | ||||||||||||
( F. Strauss ) Röhl. |
Puccinia conglomerata is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite belonging to the daisy family Homogyne and Petasites . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It iswidespread in the Holarctic .
features
Macroscopic features
Puccinia conglomerata 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 conglomerata 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, which predominantly grow on the underside of the host leaves, are chestnut brown, powdery, gregarious and uncovered. The chestnut-brown teliospores are two-celled, usually ellipsoidal and 24–34 × 15–19 µm in size. Their stem is colorless.
distribution
The known distribution area of Puccinia conglomerata extends from eastern North America to Europe .
ecology
The host plants of Puccinia conglomerata are Homogyne alpina , Petasites frigidus and P. sagittatus . 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 .