Puccinia pappiana
| Puccinia pappiana | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia pappiana | ||||||||||||
| Sydow & Sydow |
Puccinia pappiana is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the grass Hackelochloa granularis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Eritrea .
features
Macroscopic features
Puccinia pappiana 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 pappiana 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 their uredia . Their cinnamon - brown uredospores are oval, 25–29 × 20–25 µm in size and finely spiky. The parts of the species growing underneath the leaves are black-brown, exposed early and compact. The hazel-brown teliospores are two-celled, usually ellipsoidal and 40–55 × 17–24 µm in size; their stalk is yellowish and up to 65 µm long.
distribution
The known distribution area of Puccinia pappiana only includes Eritrea .
ecology
The host plant of Puccinia pappiana is the sweet grass Hackelochloa granularis . 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 et al. 1971, ISBN 3-540-05336-0 .