Puccinia austroussuriensis
| Puccinia austroussuriensis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia austroussuriensis | ||||||||||||
| Tranzschel |
Puccinia austroussuriensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Trisetum sibiricum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Russia .
features
Macroscopic features
Puccinia austroussuriensis 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 austroussuriensis 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 uredia of the mushroom are yellow-brown in color. Its brownish uredospores are 30–34 × 20–33 µm in size, almost spherical and finely spiky. The parts of the species that grow on the top of the leaves are black to black-brown and long covered. Their teliospores are two-celled, usually club-shaped and 36 × 17 µm in size. Their surface is smooth.
distribution
The known distribution area of Puccinia austroussuriensis only includes the extreme east of Russia .
ecology
The host plant of Puccinia austroussuriensis is Trisetum sibiricum . 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 Uredien and their host are known; Spermogonia and aecia 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 .