Puccinia azteca
| Puccinia azteca | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia azteca | ||||||||||||
| Cummins & hens |
Puccinia azteca is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the golden oat 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 azteca 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 azteca 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 uredia of the fungus grow on the leaf surfaces of the host plant and are yellow. Their hyaline to yellow uredospores are broadly ellipsoidal to ovate, 23–28 × 20–23 µm in size and finely spiky. The black-brown parts of the species are uncovered early and compact. The light chestnut-brown teliospores are two-celled, usually clubbed to long-clubbed and 50–160 × 14–18 µm in size; its stem is golden and around 10 µm long.
distribution
The known distribution area of Puccinia azteca only includes the Desierto de los Leones near Mexico City .
ecology
The host plant of Puccinia azteca is the golden oat 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 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 .