Puccinia addita
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| Puccinia addita | ||||||||||||
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Puccinia addita is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Phalaris brachystachys . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Madeira .
features
Macroscopic features
Puccinia addita 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 addita 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 golden yellow uredia of the fungus grow on both sides of the leaf surfaces of the host plant. Their hyaline to yellow uredospores are ellipsoidal to spherical, 19-25 × 15-19 µm in size and finely spiky. The parts of the species are black-brown, exposed early and compact. The hazelnut-brown teliospores are two- to five-celled, usually cylindrical to club-shaped and 36–50 × 16–18 µm in size; their stalk is brownish and up to 10 µm long.
distribution
The known distribution area of Puccinia addita only includes Madeira .
ecology
The host plant of Puccinia addita is Phalaris brachystachys . 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 Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .