Puccinia polysora
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Puccinia polysora is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of various sweet grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in large parts of the world.
features
Macroscopic features
Puccinia polysora can only be recognized with the naked eye by means of the spore beds emerging 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 polysora 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 species grow on both sides of the leaves of the host plants. Their yellow to golden uredospores are irregularly ellipsoidal to ovate, 29–36 × 23–29 µm in size and finely spiky. The bilateral growing parts are black-brown, covered long and small. The hazelnut-brown teliospores are one to two-celled, variable in shape and 29–41 × 20–27 µm in size; their stem is yellow or brown and up to 30 µm long.
distribution
The known distribution area of Puccinia polysora includes America from the USA to Peru , Africa, Thailand and the Philippines .
ecology
The host plants of Puccinia polysora are maize ( Zea mays ), Erianthus alopecuroides , Euchlaena maxicana and various Tripsacum 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 Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .