Puccinia nassellae
| Puccinia nassellae | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia nassellae | ||||||||||||
| Arthur & Holway |
Puccinia wet harboring is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of sweet grasses of the Stipeae tribe . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in South America .
features
Macroscopic features
Puccinia nassellae 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 wet harboring growing 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 golden uredospores are oval to almost spherical, 26–30 × 23–26 µm in size and finely spiky. The telia are black-brown, uncovered and compact. The hazel-brown teliospores are two-celled, usually broadly ellipsoidal and 36–44 × 21–26 µm in size; their stem is hyaline or golden and up to 60 µm long.
distribution
The well-known distribution area of Puccinia nassellae includes South America from Argentina to Bolivia .
ecology
The host plants of Puccinia nassellae are sweet grasses of the Stipeae tribe ( Stipa brachyphylla and Nessella spp.). 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 .