Puccinia changtuensis
| Puccinia changtuensis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia changtuensis | ||||||||||||
| YC Wang |
Puccinia changtuensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of an unspecified Deyeuxia - sweet grass . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to China .
features
Macroscopic features
Puccinia changtuensis 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 changtuensis 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 yellow-brown uredia of the fungus grow on the upper side of the host leaves, less often on cladding tubes. Their bright golden yellow uredospores are 27–31 × 27–30 µm in size, ovate to spherical to broadly ellipsoidal and finely spiky. The parts of the species that grow on the top of the leaves are black-brown and open early. The dark hazel-brown teliospores are two-celled, usually long ellipsoid and 18–68 × 18–25 µm in size. Its stem is yellowish to colorless and up to 100 µm long.
distribution
The known distribution area of Puccinia changtuensis only includes the Chinese Changtu .
ecology
The host plant of Puccinia changtuensis is an indeterminate Deyeuxia species. 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 .