Puccinia diarrhenae
| Puccinia diarrhenae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia diarrhenae | ||||||||||||
| Miyabe & Ito |
Puccinia Diarrhena is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass genus Diarrhenae . 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
Puccinia diarrhenae can only be recognized with the naked eye from 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 diarrhenae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known, the same applies to the uredia . Their light yellow uredospores are mostly oval to broadly ellipsoid, 24–28 × 19–22 µm in size and finely spiky. The parts growing underneath the leaf are black-brown, uncovered early and compact. The teliospores are two-celled, usually long ovate to oblong, apically fingered and 34–45 × 12–18 µm in size; their stalk is yellowish and up to 50 µm long.
distribution
The known distribution area of Puccinia diarrhenae includes eastern Russia , China , Korea and Japan .
ecology
The host plants of Puccinia diarrhenae are Diarrhena manshurica and D. japonica . 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 1971, ISBN 3-540-05336-0 .