Puccinia schedonnardi
| Puccinia schedonnardi | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia schedonnardi | ||||||||||||
| Kellerm. & Swingle |
Puccinia schedonnardi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the mallow family and various sweet grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in America and East Asia.
features
Macroscopic features
Puccinia schedonnardi 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 schedonnardi grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The systemically growing aecia of the fungus have 20–24 × 16–19 µm , ellipsoidal to spherical, hyaline aeciospores with a wrinkled surface. The cinnamon-brown uredia of the species grow on both sides of the leaves of the host plant. Their light cinnamon-brown uredospores are 21–26 × 18–24 µm in size and finely spiky. The bilateral growing parts of the species are blackish, powdery and exposed early. The light hazelnut-brown teliospores of the fungus are two-celled, rarely vertically septate, usually long ellipsoid to ellipsoid and 28–26 × 18–25 µm in size. Their stem is usually colorless and up to 125 µm long.
distribution
The known distribution area of Puccinia schedonnardi extends from Argentina to the northern USA and also includes Japan and the Philippines .
ecology
The host plants of Puccinia schedonnardi for the Haplonts are mainly Hibiscus species and other mallow family (Malvaceae spp.) As well as sweet grasses of the genera Lycurus , Melica , Muhlenbergia , Schedonnardus , Sporobolus and Diplasis for the Dikaryonts . 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, Spermogonia and Aecien and changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .