Puccinia alpina
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| Scientific name | ||||||||||||
| Puccinia alpina | ||||||||||||
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Puccinia alpina is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of violets . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It iswidespread in the Palearctic .
features
Macroscopic features
Puccinia alpina 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 alpina grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Spermogonia and aecia of the species are unknown. The same applies to uredia of the mushroom. The parts of the species growing on the leaves of the host plants are black-brown and initially covered by the epidermis, but break out early. The light brown teliospores are two-celled, usually ellipsoidal to broadly fusiform, reticulate and 35–52 × 14–21 µm in size. Their stem is colorless and short.
distribution
The known distribution area of Puccinia alpina includes the Eurasian area of its host genus.
ecology
The host plants of Puccinia alpina are various types of violets ( Viola spp.). 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 probably microcyclical development cycle of which only parts are known so far.
literature
- Ernst Gäumann: The rust fungi of Central Europe. With special consideration of Switzerland . In: Contributions to the cryptogam flora in Switzerland . tape 12 . Commission publisher Buchdruckerei Büchler & Co, Bern 1959.