Puccinia lasiacidis
| Puccinia lasiacidis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia lasiacidis | ||||||||||||
| core |
Puccinia lasiacidis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Lasiacis divaricata . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Venezuela .
features
Macroscopic features
Puccinia lasiacidis 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 lasiacidis 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 mushroom's cinnamon-brown (or lighter-colored) uredia grow on the underside of the host's leaves. Their golden to yellow uredospores are usually spherical, 20–24 × 17–20 µm in size and finely spiky. The parts of the species growing underneath the leaves are black-brown and long covered. The yellow to light golden brown teliospores of the species are two-celled, partly longitudinally septate, elongated to long ellipsoid and 27–29 × 18–20 µm in size. Their stem is colorless and up to 95 µm long.
distribution
The known distribution area of Puccinia lasiacidis only includes Venezuela .
ecology
The host plant of Puccinia lasiacidis is Lasiacis divaricata . 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 B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .