Puccinia virgata
| Puccinia virgata | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia virgata | ||||||||||||
| Ellis & Everh. |
Puccinia virgata is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the Erianthus and Sorghastrum species. Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. Their distribution area extends from the northern USA to Brazil .
features
Macroscopic features
Puccinia virgata 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 virgata grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia of the species are not yet known. The hazelnut brown uredia grow on both sides of the host's leaves. Their uredospores, which are also cinnamon- brown, are mostly ovate, 31–40 × 20–27 µm in size and finely spiky. The parts of the species are black-brown, exposed early and compact, they grow underneath the leaves. The hazelnut brown teliospores are two-celled, usually club-shaped and 45–60 × 18–26 µm in size; their stalk is brown and up to 20 µm long.
distribution
The known distribution area of Puccinia virgata covers an area that extends from Brazil to the northern United States .
ecology
The host plants of Puccinia virgata are various Sorghastrum and Erianthus species. 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 Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .