Puccinia nyasaensis
| Puccinia nyasaensis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia nyasaensis | ||||||||||||
| Cummins |
Puccinia nyasaensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the millet Panicum ecklonii . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Malawi .
features
Macroscopic features
Puccinia nyasaensis 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 nyasaensis 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 species. Their dark hazel-brown uredospores are spherical to broadly ovate, 28–32 × 24–26 µm in size and finely spiky. The branches growing on both sides are black-brown, uncovered early and powdery. The hazelnut-brown teliospores are two-celled, always longitudinally septate, ovoid to spherical and 24–33 × 24–28 µm in size; their stalk is colorless and up to 45 µm long.
distribution
The known distribution area of Puccinia nyasaensis only includes Malawi .
ecology
The host plant of Puccinia nyasaensis is the millet Panicum ecklonii . 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 .