Puccinia agropyri
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| Puccinia agropyri | ||||||||||||
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Puccinia agropyri is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of clematis and forest curls . Symptoms of infestation by the species are yellow spots of rust and pustules on the leaf surfaces of the host plants. The range includes the temperate zones around the world.
features
Puccinia agropyri 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 or blackish spots and pustules on the leaf surfaces.
The mycelium of Puccinia agropyri grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your pyknia grow on both sides. The aecia of the species grow in circular groups and form swollen areas. They have obtuse polyhedral to spherical aecidiospores 18-25 × 18-25 µm , which are orange and warty. The uredia are elongated. Their uredospores are ovate to ellipsoidal, 24–32 × 21–23 µm in size, light brownish and spiky. The parts of the species are elongated and covered. The teleutospores are two-celled, club-shaped and 28–62 × 13–23 µm in size. They are brownish, their stem is very short.
distribution
Puccinia agropyri has a distribution area that extends over the temperate zones of the northern and southern hemisphere.
ecology
The host plants of Puccinia agropyri are haplont clematis ( Clematis spp.) And woodquecks ( Agropyron 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 pycnias, uredia, telia and aecidia.
literature
- Ernst Gäumann: The rust fungi of Central Europe. With special consideration of Switzerland . In: Contributions to the cryptogam flora in Switzerland . tape XII . Commission publisher Buchdruckerei Büchler & Co, Bern 1959.