Puccinia agrostidicola
| Puccinia agrostidicola | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia agrostidicola | ||||||||||||
| Tai |
Puccinia agrostidicola is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of an indeterminate ostrich 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 agrostidicola 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 agrostidicola 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 yellowish uredia of the fungus usually grow on the underside of the host's leaves, sometimes also on cladding tubes, and are elongated or linear. Their yellowish uredospores are 24–33 × 23–30 µm in size, mostly spherical, more rarely egg-shaped and finely spiky. The parts of the species, which usually grow on the underside of the leaves and occasionally also on cladding tubes, are blackish and powdery. The hazelnut-brown teliospores are one to two-celled, ellipsoidal and 36–56 × 17–27 µm in size. Their stalk is yellowish to colorless and 46 µm long.
distribution
The known distribution area of Puccinia agrostidicola only includes China .
ecology
The host plant of Puccinia agrostidicola is an unspecified ostrich grass ( Agrostis sp.). 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 .