Puccinia agrostidis
| Puccinia agrostidis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia agrostidis | ||||||||||||
| Plowright |
Puccinia agrostidis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of columbines and ostrich grasses . Symptoms of infestation by the species are yellow spots of rust and pustules on the leaf surfaces of the host plants. The distribution area covers large parts of the ancient world.
features
Puccinia agrostidis 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 or blackish spots and pustules on the leaf surfaces.
The mycelium of Puccinia agrostidis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your pyknia are hemispherical to spherical. The aecia of the species grow as cups in rounded groups. They have truncated polyhedral to spherical aecidiospores of 14–24 × 12–21 µm , which are warty on the outside. The uredia are line-shaped and light orange. Their uredospores are spherical to short-oval, 17-25 × 13-20 µm in size, orange and warty. The parts of the species are small, grouped in a ring and dark brown. The teleutospores are two-celled, cylindrical to short-clubbed and 29–55 × 12–20 µm in size. They are brownish, their stem is very short and dark brown.
distribution
Puccinia agrostidis has a distribution area that extends over Africa, Eurasia and Australia.
ecology
The host plants of Puccinia agrostidis are as Haplont columbines ( Aquilegia spp.) And ostrich grasses ( Agrostis 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.