Puccinia piptochaetii
| Puccinia piptochaetii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia piptochaetii | ||||||||||||
| Dietel & Neger |
Puccinia piptochaetii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass - genus Piptochaetium . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in South America .
features
Macroscopic features
Puccinia piptochaetii 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 piptochaetii 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 cinnamon-brown uredia of the fungus grow on the underside of the host's leaves. Their uredospores, which are also cinnamon- brown, are usually ovate, 19-25 × 17-21 µm in size and finely spiky. The parts of the species growing on the underside of the leaves and on sheaths are black-brown and uncovered early. The hazel-brown teliospores of the species are two-celled, usually ellipsoidal to narrowly ovate and 30–43 × 17–21 µm in size. Their stalk is hyaline and up to 50 µm long.
distribution
The known distribution area of Puccinia piptochaetii extends from Argentina to Bolivia , Chile and Uruguay .
ecology
The host plants of Puccinia piptochaetii are different Piptochaetium 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 and their host are known; Spermogonia and aecia could not be assigned to the fungus.
literature
- George B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .