Puccinia pazensis
| Puccinia pazensis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia pazensis | ||||||||||||
| Greene & Cummins |
Puccinia pazensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Nassella pubiflora . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Bolivia .
features
Macroscopic features
Puccinia pazensis 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 pazensis 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 uredia of the fungus grow on the upper side of the host leaves. Their yellow to hyaline uredospores are 23–28 × 20–24 µm in size, spherical to ovoid and labyrinthine-wrinkled. The parts of the species that grow on the upper side are blackish and open early. The golden to light chestnut brown teliospores are two-celled, broadly ellipsoid and 42–48 × 27–30 µm in size. Their stem is colorless and up to 135 µm long.
distribution
The known distribution area of Puccinia pazensis only includes Bolivia .
ecology
The host plant of Puccinia pazensis is Nassella pubiflora . 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 et al. 1971, ISBN 3-540-05336-0 .