Puccinia polliniae-quadrinervis
| Puccinia polliniae-quadrinervis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia polliniae-quadrinervis | ||||||||||||
| Dietel |
Puccinia polliniae-quadrinervis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Eulalia quadrinervis . 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 polliniae-quadrinervis 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 polliniae-quadrinervis 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 underside of the host leaves. Their uredospores, which are also cinnamon-brown, are 26–30 × 26–30 µm in size, spherical and slightly warty. The parts of the species growing underneath the leaves are black-brown, powdery and exposed early. The chestnut-brown teliospores are two-celled, broadly ellipsoid and 30–36 × 23–26 µm in size. Their stem is colorless and up to 60 µm long.
distribution
The known distribution area of Puccinia polliniae-quadrinervis includes Japan and the Philippines .
ecology
The host plant of Puccinia polliniae-quadrinervis is Eulalia quadrinervis . 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 .