Puccinia eh
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia eh | ||||||||||||
| Cummins |
Puccinia wiehei is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the millet Setaria splendida . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Malawi .
features
Macroscopic features
Puccinia wiehei 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 wiehei 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 small, yellow uredia of the species grow on both sides of the leaves of the host plants and are elliptical in shape. Their hyaline uredospores are mostly ovate, 25–28 × 19–23 µm in size and finely spiky. The branches growing on both sides are black-brown, uncovered early and powdery. The hazelnut-brown teliospores are two-celled, usually ellipsoid to broadly ellipsoid and 40–48 × 22–24 µm in size; its stem is colorless and up to 120 µm long.
distribution
The known distribution area of Puccinia wiehei only includes Malawi .
ecology
The host plant of Puccinia wiehei is the millet Setaria splendida . 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 .