Puccinia angusii
| Puccinia angusii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia angusii | ||||||||||||
| Cummings |
Puccinia angusii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the grass species Danthoniopsis pruinosa . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. The distribution area is in Zambia .
features
Macroscopic features
Puccinia angusii 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 angusii grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Spermogonia or aecidia are not known. The yellow-brown uredia grow on the underside of the host's leaves. Their uredospores are ovate to broadly ellipsoidal, 24–28 × 20–24 µm in size and finely spiky. The species has black-brown, egg to spherical amphispores of 28–34 × 24–28 µm. The parts of the species are black-brown and break out quickly. The hazelnut-brown teleutospores are two-celled, ovate to ellipsoid and 32–40 × 20–24 µm in size; their stalk is up to 30 µm long and yellowish.
distribution
The known distribution area of Puccinia angusii only includes Zambia .
ecology
The host plant of Puccinia angusii is Danthoniopsis pruinosa . 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 with Telien and Uredien, which manages without change of host. Spermogonia and aecidia are absent.
Individual evidence
literature
- George B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .