Puccinia fragosoi
| Puccinia fragosoi | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia fragosoi | ||||||||||||
| Bubák |
Puccinia fragosoi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of leek and schiller 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 covers large parts of Europe.
features
Macroscopic features
Puccinia fragosoi 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 spots and pustules on the leaf surfaces.
Microscopic features
The mycelium of Puccinia fragosoi grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your pyknia are honey-colored to reddish brown and grow on both sides of the leaf. The aecia are small, cup-shaped and orange. They have angular aecidiospores of 22–30 × 18–20 µm that are hyaline and finely warty. The uredia usually grow on the upper side of the leaf and are yellow-brown. Their uredospores are first spherical, later egg or pear-shaped, 19–34 × 19–34 µm in size and warty. The parts of the species growing underneath the leaves are ellipsoidal to elongated and black. The teleutospores are one to two-celled, elongated to club-shaped and 30–75 × 13–22 µm in size. They are brown, their stalk is 10-20 µm long and yellow-brown.
distribution
Puccinia fragosoi has a distribution area that extends over large parts of Europe.
ecology
The host plants of Puccinia fragosoi are as Haplont leek ( Allium spp.) And Schiller grasses ( Koeleria 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.