Puccinia leptospora
| Puccinia leptospora | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia leptospora | ||||||||||||
| Ricker |
Puccinia leptospora is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Trisetum virletii . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Mexico .
features
Macroscopic features
Puccinia leptospora 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 leptospora 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. Its colorless uredospores are 24–29 × 17–20 µm in size and finely spiky. The parts of the species growing underneath the leaves are black-brown, compact and uncovered early. The hazelnut-brown teliospores are two-celled, cylindrical or club-shaped and cylindrical and 85–140 × 15–20 µm in size. At the top they have finger-like extensions. Their stalk is yellowish and up to 20 µm long.
distribution
The known distribution area of Puccinia leptospora only includes Mexico .
ecology
The host plant of Puccinia leptospora is Trisetum virletii . 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 their host are known; Uredien, Spermogonia and Aecien 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 .