Puccinia hyparrhenicola
| Puccinia hyparrhenicola | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia hyparrhenicola | ||||||||||||
| ( Maire ) Beltran |
Puccinia hyparrhenicola 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 endemic to the Canaries .
features
Macroscopic features
Puccinia hyparrhenicola 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 hyparrhenicola 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 hazel-brown uredia of the fungus grow on the underside of the leaf surfaces of the host plant. Their dark cinnamon to hazelnut brown uredospores are broadly ovate to spherical, 28–31 × 24–27 µm in size and finely spiky. The parts of the species are not known. The golden brown teliospores are two-celled, usually oblong or long ellipsoid and 33–40 × 16–19 µm in size; their stalk is hyaline and up to 15 µm long.
distribution
The known distribution area of Puccinia hyparrhenicola only includes the Canaries .
ecology
The host plant of Puccinia hyparrhenicola 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 uredia and their host are known so far; Telia, 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 .