Puccinia andropogonis-hirti
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| Puccinia andropogonis-hirti | ||||||||||||
| ( Maire ) Beltran |
Puccinia andropogonis-hirti is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Hyparrhenia hirta . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in the Mediterranean area .
features
Macroscopic features
Puccinia andropogonis-hirti 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 andropogonis-hirti 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 leaf surfaces of the host plant. Their cinnamon - brown uredospores are broad-oval to ovate, 29–35 × 24–28 µm in size and finely spiky. The black-brown parts of the species that grow underneath the leaves are uncovered early and compact. The hazel-brown teliospores are two-celled, usually broadly ellipsoid and 32–38 × 22–28 µm in size; their stalk is hyaline to brownish and up to 35 µm long.
distribution
The known distribution area of Puccinia andropogonis-hirti extends over the area of the Mediterranean .
ecology
The host plant of Puccinia andropogonis-hirti is the sweet grass Hyparrhenia hirta . 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 .