Puccinia invenusta
| Puccinia invenusta | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia invenusta | ||||||||||||
| Sydow & Sydow |
Puccinia invenusta is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the Phragmites species. Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in large parts of the ancient tropics.
features
Macroscopic features
Puccinia invenusta 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 invenusta grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia are not known of this species. The yellowish uredia grow on both sides of the host's leaves. Their golden or yellow uredospores are variably shaped, 25–32 × 15–18 µm in size and finely spiky. The parts of the species are black-brown, exposed early and grow underneath. The golden to hazel-brown teliospores are simply septate, usually ellipsoid and 34–42 × 16–20 µm in size; their stalk is yellowish to brownish and up to 100 µm long.
distribution
The known distribution area of Puccinia invenusta extends from Africa via India and China to the Philippines .
ecology
The host plants of Puccinia invenusta are various Phragmites species. 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 are known so far; 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 .