Puccinia opipara
| Puccinia opipara | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia opipara | ||||||||||||
| Cummins |
Puccinia Opipara is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Oplismenus minarum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Bolivia .
features
Macroscopic features
Puccinia opipara 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 Opipara 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 yellowish uredia of the fungus grow on the underside of the host's leaves. Their colorless to yellowish uredospores are mostly broad ellipsoid, 31–40 × 25–31 µm in size and finely spiky. The parts of the species growing underneath the leaves are black-brown and uncovered early. The dark, hazel-brown teliospores of the fungus are two-celled, usually ellipsoidal and 33–44 × 23–28 µm in size. Their stem is light yellow and up to 70 µm long.
distribution
The known distribution area of Puccinia opipara only includes Bolivia .
ecology
The host plant of Puccinia opipara is Oplismenus minarum . 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 .