Puccinia zoysiae
| Puccinia zoysiae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia zoysiae | ||||||||||||
| Dietel |
Puccinia zoysiae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite red plant genus Paederia and the sweet grass Zoysia pungens . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in East Asia and North America .
features
Macroscopic features
Puccinia zoysiae 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 zoysiae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the fungus have 16–21 × 12–17 µm large, colorless aeciospores with a spherical to broad egg-like shape with a wrinkled surface. The pale yellow uredia of the species grow on both sides of the leaves of the host plant. Their yellowish to golden uredospores are usually ovate to ellipsoidal, 17–22 × 15–18 µm in size and finely spiky. The bilateral growing parts of the species are black-brown and uncovered early. The hazelnut-brown teliospores of the fungus are two-celled, usually ellipsoidal and 0–40 × 16–22 µm in size. Their stalk is yellowish and up to 100 µm long.
distribution
The known distribution area of Puccinia zoysiae includes China , Japan and the USA .
ecology
The host plants of Puccinia zoysiae are for haplonts different Paederia TYPES and Zoysia pungens for dikaryotic . 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 .