Puccinia cryptica
| Puccinia cryptica | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia cryptica | ||||||||||||
| Arthur & Holway |
Puccinia cryptica is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of bristles and barley . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Chile .
features
Macroscopic features
Puccinia cryptica can only be recognized with the naked eye by 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 cryptica 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 both sides of the host leaves. Its yellow-brown uredospores are 25–30 × 22–27 µm in size, mostly broad ellipsoidal to spherical and finely spiky. The underside of the leaf growing parts of the species are blackish and long covered. The hazelnut-brown teliospores are one- to two-celled, usually oblong to long ovate and 34–42 × 20–30 µm in size. Their stem is brownish and up to 20 µm long.
distribution
The known distribution area of Puccinia cryptica only includes Chile .
ecology
The host plants of Puccinia cryptica are brines ( Bromus spp.) And barley ( Hordeum 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 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 .