Puccinia crandallii
| Puccinia crandallii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia crandallii | ||||||||||||
| Pammel & Hume |
Puccinia crandallii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of snowberries as well as bluegrass , Hesperochloa kingii and fescue . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in western North America .
features
Macroscopic features
Puccinia crandallii 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 crandallii grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species have colorless aeciospores with a wrinkled surface , 21–33 × 18–26 µm in size. The cinnamon-brown uredia of the fungus grow on the top of the host leaves. Their cinnamon-brown uredospores are 30–37 × 24–28 µm in size, almost spherical to ellipsoidal and finely spiky. The parts of the species that grow on the top of the leaves are black-brown, exposed early and compact. The light hazelnut-brown teliospores are two-celled, usually narrowly ovate to ellipsoidal and 40–50 × 20–26 µm in size. Their stalk is yellowish to brownish and up to 70 µm long.
distribution
The known distribution area of Puccinia crandallii includes the western United States .
ecology
The host plants of Puccinia crandallii are snowberries for the haplonts ( Symphoricarpos spp.) And fescue ( Festuca spp.), Bluegrass ( Poa spp.) And Hesperochloa kingii for the dicaryonts . 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 has a development cycle with Telien, Uredien, Aecien and Spermogonia and changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .