Puccinia montanensis
| Puccinia montanensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia montanensis | ||||||||||||
| Kazenas |
Puccinia montanensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of barberries ( Berberis spp.), Comb curls ( Agropyron spp.), Couch grass ( Elymus spp.), Barley ( Hordeum ) and Sitanion spp. Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in North America .
features
Macroscopic features
Puccinia montanensis 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 montanensis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species grow locally on barberries, their aeciospores are wrinkled and 22–27 × 19–23 µm in size. The light cinnamon-brown uredia of the mushroom grow on the upper leaf surfaces of the host plant. Their cinnamon - brown uredospores are broadly ellipsoidal to ellipsoidal, 27–33 × 21–25 µm in size and finely spiky. Most leaf underside Telien the type are blackish, covered and compact. The hazelnut-brown teliospores are two- to three-celled, usually ovoid or broadly ovate and 40–55 × 22–32 µm in size; their stalk is brown and up to 15 µm long.
distribution
The known distribution area of Puccinia montanensis covers the western half of Canada and the USA .
ecology
The host plants of Puccinia montanensis are barberries ( Berberis spp.) For the haplont , comb quicks ( Agropyron spp.), Couch grass ( Elymus spp.), Barley ( Hordeum ) and Sitanion spp. for the dikaryote . 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 Aecien, Spermogonia, Telien and Uredien and undergoes a host change.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .