Puccinia rupestris
| Puccinia rupestris | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia rupestris | ||||||||||||
| Juel |
Puccinia rupestris is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of alpine clefts and sedges . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Northern and Central Europe.
features
Macroscopic features
Puccinia rupestris 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 rupestris grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia are unknown. The aecia of the species growing on the underside of the host leaves are on black-violet spots. Their golden-brown aeciospores are 15–22 × 15–22 µm in size, flattened, spherical and finely waxy. The uredia of the fungus growing underneath the leaves are dark brown and small. Their yellow-brown uredospores are narrow ellipsoidal to ovate, 25 × 19 µm in size and slightly spiky. The parts of the species, which often arise from the uredia, are black-brown and elliptical to elongated. The dark brown teliospores are two-celled, usually club-shaped and 35–50 × 13–20 µm in size. Their stem is 30–50 µm long.
distribution
The known distribution area of Puccinia rupestris includes the north and the high mountains of Europe.
ecology
The host plants of Puccinia rupestris are alpine clusters ( Saussurea spp.) For the haplonts and sedges ( Carex spp.) For the dikaryotes . 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
- Ernst Gäumann: The rust fungi of Central Europe. With special consideration of Switzerland . In: Contributions to the cryptogam flora in Switzerland . tape 12 . Commission publisher Buchdruckerei Büchler & Co, Bern 1959.