Puccinia araguata
Puccinia araguata | ||||||||||||
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Scientific name | ||||||||||||
Puccinia araguata | ||||||||||||
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Puccinia araguata is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Paspalum microstachyum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Venezuela .
features
Macroscopic features
Puccinia araguata 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 araguata 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 light cinnamon brown uredia of the species grow on both sides of the leaves of the host plants. Your golden - brown uredospores are ellipsoidal to ovate, 27–31 × 19–21 µm in size and finely spiky. The upper-side growing parts of the species are black-brown and uncovered early. The golden to light hazelnut brown teliospores are two-celled, usually wide to elongated club-shaped and 44–51 × 24–27 µm in size. Their stem is colorless and short.
distribution
The known distribution area of Puccinia araguata only includes Venezuela .
ecology
The host plant of Puccinia araguata is Paspalum microstachyum . 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 .