Puccinia windsoriae
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia windsoriae | ||||||||||||
| Schweinitz |
Puccinia wind soriae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the clover elm and the sweet grass Tridens flavus . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in eastern North America .
features
Macroscopic features
Puccinia windsoriae 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 wind soriae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The cylindrical aecia of the species have 16–23 × 15–18 µm large, spherical to ellipsoidal, hyaline aeciospores with a warty surface. The cinnamon-brown uredia of the fungus grow on both sides of the host leaves. Their golden or cinnamon-brown uredospores are 24–30 × 21–24 µm in size, spherical to ellipsoidal and warty. The leaves of the species growing on the underside of the leaves and on stems are black-brown, powdery and exposed early. The chestnut-brown teliospores are two-celled, usually ovoid to ellipsoid and 32–42 × 17–22 µm in size. Their stem is golden and up to 60 µm long.
distribution
The known range of Puccinia windsoriae extends over the United States east of the Rocky Mountains .
ecology
The host plant of Puccinia windsoriae is Tridens flavus . 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 with Telien, Uredien, Aecien and Spermogonia and does not change host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .