Puccinia pazschkei
| Puccinia pazschkei | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia pazschkei | ||||||||||||
| Dietel |
Puccinia pazschkei is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of stone breakers . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It iswidespread in the Holarctic .
features
Macroscopic features
Puccinia pazschkei 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 pazschkei 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 absent. The same applies to uredia of the mushroom. The parts of the species growing on the top of the leaves of the host plants are mostly dark brown and initially uncovered, later bare. They stand alone or in loose groups. The light brown teliospores are two-celled, usually ellipsoid, slightly bumpy and 26–38 × 18 µm in size. Their stem is colorless and short.
distribution
The known distribution area of Puccinia pazschkei includes North America and Europe .
ecology
The host plants of Puccinia pazschkei are various stone quarries ( Saxifraga 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 microcyclic development cycle that includes only Telia and does not include Aecia, Spermogonia and Uredia.
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.