Puccinia huberi
| Puccinia huberi | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia huberi | ||||||||||||
| Hennings |
Puccinia huberi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite of Panicum - millet . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in South America and the Caribbean.
features
Macroscopic features
Puccinia huberi 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 huberi 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 the underside of the leaves of the host plants. Their golden to light cinnamon - brown uredospores are broadly ellipsoidal to ovate, 24–27 × 20–24 µm in size and finely spiky. The bilateral growing parts of the species are black-brown and uncovered early. The hazelnut-brown teliospores are one to two-celled, usually ellipsoid to club-shaped ellipsoid and 31–39 × 20–26 µm in size. Their stem is golden and up to 15 µm long.
distribution
The known distribution area of Puccinia huberi includes Brazil , Costa Rica and Puerto Rico .
ecology
The host plants of Puccinia huberi are Panicum ovalifolium and P. trichoides . 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 .