Puccinia leptochloae
| Puccinia leptochloae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia leptochloae | ||||||||||||
| Arthur & Fromme |
Puccinia leptochloae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the carnation-like genera Calandrinia and Talinum and the sweet grass Leptochloa filiformis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in much of America.
features
Macroscopic features
Puccinia leptochloae 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 leptochloae 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 17-21 × 14-16 µm large, spherical to ellipsoidal aeciospores with a warty surface. The cinnamon-brown uredia of the fungus grow on the underside of the host leaves. Their golden to cinnamon brown uredospores are 19–26 × 18–24 µm in size, spherical to ovoid and warty. The parts of the species growing underneath the leaves are blackish, powdery and exposed early. They grow in rows and often flow together in up to 5 mm long lines. The dark maroon teliospores are one- to two-celled, broadly ellipsoid and 25–34 × 17–24 µm in size. Their stem is golden and up to 95 µm long.
distribution
The known distribution area of Puccinia leptochloae extends from Argentina to the southern United States .
ecology
The host plants of Puccinia leptochloae are for the Haplonts Talinum and Calandrinia species and Leptochloa filiformis for the dikaryote . 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 changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .