Puccinia lavroviana
| Puccinia lavroviana | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia lavroviana | ||||||||||||
| Cummins |
Puccinia lavroviana is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Avenochloa pubescens . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in eastern Russia .
features
Macroscopic features
Puccinia lavroviana can only be recognized with 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 lavroviana grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known, the same applies to uredia of the fungus or its uredospores. The branches of the species growing on both sides, but mostly underside of the leaves and on sheaths, are blackish, powdery and long uncovered. The brown teliospores are two-celled, long club-shaped and 37–62 × 12–19 µm in size. Their stem is colorless and extremely short.
distribution
The known distribution area of Puccinia lavroviana includes the Russian Altai .
ecology
The host plant of Puccinia lavroviana is Avenochloa pubescens . 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 of which only Telien and their host are known; Uredien, Spermogonia and Aecien could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .