Puccinia psammochloae
| Puccinia psammochloae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia psammochloae | ||||||||||||
| YCWang |
Puccinia psammochloae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Psammochloa villosa . 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 psammochloae 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 psammochloae 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 yellow-brown uredia of the fungus usually grow on the upper side of the host leaves and on the cladding tubes. Their golden-yellow uredospores are 26–28 × 26–28 µm in size, spherical and finely spiky. The parts of the species that grow on the top of the leaves are black-brown and open early. The chestnut-brown teliospores are two-celled, usually ovate to ellipsoidal and 50–58 × 20–23 µm in size. Their stem is pigmented and up to 120 µm long.
distribution
The known distribution area of Puccinia psammochloae only includes Inner Mongolia .
ecology
The host plant of Puccinia psammochloae is Psammochloa villosa . 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 .