Puccinia malalhuensis
| Puccinia malalhuensis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia malalhuensis | ||||||||||||
| JC Lindq. |
Puccinia malalhuensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Stipa gynerioides . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Argentina .
features
Macroscopic features
Puccinia malalhuensis 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 malalhuensis 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 the uredia of the fungus. Their light yellow uredospores are 22–26 × 22–26 µm in size, broadly ellipsoidal to spherical and finely spiky. The upper-side growing parts of the species are black-brown, compact and exposed early. The hazelnut-brown teliospores are two-celled, ellipsoidal to ovate and 32–40 × 18–22 µm in size. Their stalk is yellowish to brownish and up to 120 µm long.
distribution
The known distribution area of Puccinia malalhuensis only includes Argentina .
ecology
The host plant of Puccinia malalhuensis is Stipa gynerioides . 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 et al. 1971, ISBN 3-540-05336-0 .