Puccinia fragosoana
| Puccinia fragosoana | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia fragosoana | ||||||||||||
| Beltran |
Puccinia fragosoana is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Imperata cylindrica and Schizachryrium sanguineum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. Their distribution area extends from the Mediterranean to South Africa .
features
Macroscopic features
Puccinia fragosoana 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 fragosoana grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The species evidently lacks aecia and spermogonia . The uredia grow on both sides of the host's leaves. Their golden to hazelnut brown uredospores are mostly ovate, 30–43 × 20–25 µm in size and finely spiky. The parts of the species are black-brown, exposed early and compact. The hazelnut-brown teliospores are two-celled, usually elliptical in shape and 26–34 × 16–23 µm in size; their stalk is brown and up to 45 µm long.
distribution
The known distribution area of Puccinia fragosoana includes an area that extends from Spain to Sierra Leone to South Africa .
ecology
The host plants of Puccinia fragosoana are Imperata cylindrica and Schizachryrium sanguineum . 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 apparently has a development cycle with Telien and Uredien, which manages without change of host; Spermogonia and aecia are apparently absent.
literature
- George B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .