Puccinia festucina
| Puccinia festucina | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia festucina | ||||||||||||
| Sydow & P. Sydow |
Puccinia festucina is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of grape hyacinths and sheep 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 festucina can only be recognized by the naked eye from 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 festucina 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 spots. They have spherical to ovoid aecidiospores of 20–30 × 16–23 µm , which are hyaline and finely warty. There are no Uredien in the narrower sense. The uredospores grow between the segments and are usually spherical to elongated, 20–22 × 20–22 µm in size, yellowish and slightly spiky. The parts of the species are elongated and black-brown. The teleutospores are two-celled, variably shaped and 33–76 × 12–20 µm in size. They are yellowish, their stem is short and the same color.
distribution
Puccinia festucina has a distribution area that includes southern, central and eastern Europe.
ecology
The host plants of Puccinia festucina are as Haplont grape hyacinths ( Muscari spp.) 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.