Puccinia harryana
| Puccinia harryana | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia harryana | ||||||||||||
| Jørstad |
Puccinia harryana is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Stipa pappiformis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to China .
features
Macroscopic features
Puccinia harryana can only be recognized with the naked eye by 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 harryana 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 cinnamon-brown uredia of the fungus grow on the top of the host leaves. Their golden to almost cinnamon-brown uredospores are 30–36 × 27–31 µm in size, spherical to broadly ovoid and finely spiky. The parts of the species that grow on the top of the leaves are black-brown, compact and open early. The light hazelnut-brown teliospores are two-celled, usually spindle-shaped-ellipsoidal to ellipsoidal, pointed at the tip and 50–70 × 20–26 µm in size. Their stem is colorless and up to 100 µm long.
distribution
The known distribution area of Puccinia harryana only includes the Chinese Sichuan .
ecology
The host plant of Puccinia harryana is Stipa pappiformis . 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 .