Uromyces coronatus
| Uromyces coronatus | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces coronatus | ||||||||||||
| Yoshin. |
Uromyces coronatus is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Zizaria - 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 East Asia.
features
Macroscopic features
Uromyces coronatus 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 Uromyces coronatus grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known. The cinnamon-brown uredia of the fungus grow on both sides of the host's leaves and have cephalic paraphyses. Their golden to cinnamon brown uredospores are 26–36 × 19–22 µm in size, narrowly ovate to ellipsoidal and finely spiky. The parts of the species are black-brown and exposed early. The chestnut-brown teliospores are unicellular, wedge-shaped to elongated, fingered at the tip and 25–36 × 16–23 µm in size. Their stalk is brownish and up to 50 µm long.
distribution
The known distribution area of Uromyces coronatus includes China , Taiwan and Japan .
ecology
The host plants of Uromyces coronatus are Zizaria aquatica and Z. latifolia . 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 of which only Telien and Uredien and their host are known; Spermogonia and aecia could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .