Puccinia persistent
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| Scientific name | ||||||||||||
| Puccinia persistent | ||||||||||||
| Plowright |
Puccinia persistens is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of meadow rue and couch grass . Symptoms of infestation by the species are yellow spots of rust and pustules on the leaf surfaces of the host plants. The distribution area includes Northern Europe to the Alps.
features
Puccinia persistens 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 or blackish spots and pustules on the leaf surfaces.
The mycelium of Puccinia persistens grows as with all Puccinia intercellular types, and forms Saugfäden that grow into the storage tissue of the host. Your pyknia are spherical and sunken. The aecia of the species grow in groups that are violet on the top and yellowish on the underside. They have truncated polyhedral ellipsoidal aecidiospores of 19-30 × 17-20 µm that are colorless and warty. The uredia are small, round to oblong and orange on a yellow background. Your uredospores are round, 20–30 × 20–30 µm in size and spiky. The parts of the species are line-shaped, black and long covered. The teleutospores are two-celled, variably shaped and 30–56 × 12–22 µm in size. They are brownish, there is hardly any stem.
distribution
Puccinia persistens has a distribution area that extends over northern Europe and the Alps .
ecology
The host plants of Puccinia persistens are Haplont rue ( Thalictrum spp.) And couch grass ( 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.