Puccinia piperi
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| Puccinia piperi | ||||||||||||
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Puccinia piperi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of blue stars and fescue . 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 Europe.
features
Macroscopic features
Puccinia piperi 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 piperi grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your pyknia are first honey-colored, later red-brown and grow on both sides of the leaf. The aecia grow in a circle in yellowish pustules, later also bowls. They have round to ellipsoidal aecidiospores of 21–28 × 17–23 µm , which are hyaline and finely warty. The uredia grow on the upper side of the leaf and are golden yellow. Their uredospores are usually spherical to approximately spherical, 24–32 × 24–32 µm in size and slightly spiky. The parts of the species are variably shaped and light brown. The teleutospores are one to two-celled, variable in shape and 45–76 × 16–22 µm in size. They are light brown, their stem is short and brownish.
distribution
The well-known distribution area of Puccinia piperi extends from Europe to western North America.
ecology
The host plants of Puccinia piperi as Haplont include two-leaved squill ( Scilla bifolia ) and sheep fescue ( Festuca ovina ) 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.