Puccinia suksdorfii
| Puccinia suksdorfii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia suksdorfii | ||||||||||||
| Ellis & Everh. |
Puccinia suksdorfii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the Korbblütlergattung Agoseris . 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 western United States .
features
Macroscopic features
Puccinia suksdorfii can only be recognized with the naked eye by means of the spore beds emerging 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 suksdorfii grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow systemically and bilaterally on the surfaces of the host leaves. The aecia of the species are unknown. The fungus lacks uredia . The bilateral growing parts of the species are black-brown, systemic and uncovered. The chestnut-brown teliospores are two-celled, usually ellipsoidal to broadly ellipsoidal, spiky and usually 35–45 × 27–35 µm in size. Their stem is colorless.
distribution
The known distribution area of Puccinia suksdorfii extends from Montana and Washington to Arizona .
ecology
The host plants of Puccinia suksdorfii are various Agoseris species. 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 microcyclic development cycle with spermogonia, aecia and telia. As an auto-ecologic parasite, it does not change 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 .