Puccinia eritraeensis
| Puccinia eritraeensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia eritraeensis | ||||||||||||
| Pazschke |
Puccinia eritraeensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of sweet grasses of the Andropogoneae tribe . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is a pantropical spread.
features
Macroscopic features
Puccinia eritraeensis 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 eritraeensis 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 fungus usually grow on the underside of the leaf surfaces of the host plant. Their cinnamon - brown uredospores are oval to almost spherical, 24–32 × 20–25 µm in size and finely spiky. The parts of the species grow underneath the leaf and are black-brown, uncovered and compact. The hazelnut brown teliospores are two-celled, usually ellipsoidal or broadly ellipsoidal and 33–40 × 20–27 µm in size; their stalk is hyaline or yellowish and up to 90 µm long.
distribution
The known distribution area of Puccinia eritraeensis extends from Africa to Australia and also includes Honduras .
ecology
The host plants of Puccinia eritraeensis are sweet grasses of the Andropogoneae tribe . 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 uredia and their host are known so far; Telia, 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 .