Puccinia loudetia-superbae
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| Puccinia loudetia-superbae | ||||||||||||
| Cummins |
Puccinia Loudetia-superbae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Tristachya superba . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in southern Africa.
features
Macroscopic features
Puccinia loudetia-superbae can only be recognized with the naked eye from 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 Loudetia-superbae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia are not known of this species. The cinnamon brown uredia grow on both sides of the host's leaves. Its hazelnut to dark cinnamon brown uredospores are ellipsoidal to ovate, 23–28 × 18–21 µm in size and finely spiky. The parts of the species are black-brown, exposed early and can be found on both leaf sides. The dark hazel-brown teliospores are vertically septate, ellipsoidal to ovoid and 33–42 × 18–21 µm in size; their stalk is hyaline to yellowish and up to 50 µm long.
distribution
The known distribution area of Puccinia loudetia-superbae includes Angola and Malawi .
ecology
The host plant of Puccinia loudetia-superbae is Tristachya superba . 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 apparently has a development cycle with Telien and Uredien, which manages without change of host; Spermogonia and aecia are apparently absent.
literature
- George B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .