Puccinia sonorica
| Puccinia sonorica | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia sonorica | ||||||||||||
| Cummins |
Puccinia sonorica is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the Aristida species. Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It isnative tosouthern North America.
features
Macroscopic features
Puccinia sonorica 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 sonorica 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 adaxially on the leaf surfaces of the host plant. Their dark hazelnut to cinnamon - brown uredospores are ellipsoidal to ovoid, 25–30 × 20–24 µm in size and finely spiky. The adaxially growing parts of the species are black-brown, exposed early and compact. The hazelnut brown teliospores are two-celled, usually broadly ellipsoid and 22–37 × 23–26 µm in size; their stalk is hyaline and up to 175 µm long.
distribution
The known distribution area of Puccinia sonorica includes Arizona and Sonora .
ecology
The host plants of Puccinia sonorica are various Aristida species. 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 their host are known; Uredien, Spermogonia and Aecien 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 .