Puccinia faceta
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| Puccinia faceta | ||||||||||||
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Puccinia faceta is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Olyra heliconia . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Brazil .
features
Macroscopic features
Puccinia faceta can only be recognized with the naked eye by 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 faceta 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 usually grow on the underside of the host's leaves. Their cinnamon-brown uredospores are mostly ellipsoidal to ovoid, 23–26 × 18–20 µm in size and finely spiky. The parts of the species growing underneath the leaves are black-brown and uncovered early. The light hazelnut-brown teliospores of the species are two-celled, generally ellipsoidal to long-ellipsoidal and 29–35 × 18–20 µm in size. Their stalk is yellowish and up to 100 µm long.
distribution
The known distribution area of Puccinia faceta only includes Brazil .
ecology
The host plant of Puccinia faceta is Olyra heliconia . 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 .