Puccinia californica
| Puccinia californica | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia californica | ||||||||||||
| Dietel & Holway |
Puccinia californica is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sunflower family of the genus Cirsium . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in the western United States .
features
Macroscopic features
Puccinia californica 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 californica grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are so far unknown. The dark cinnamon-brown uredia of the fungus grow on both sides of the surface of the host leaves. Their chestnut to dark cinnamon brown uredospores are 27–32 × 23–27 µm in size, broadly ellipsoidal to spherical and spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered. The chestnut-brown teliospores are two-celled, usually ellipsoidal and usually 37–53 × 25–30 µm in size. Their stem is colorless and over 100 µm long.
distribution
The known distribution area of Puccinia californica stretches from California to Arizona and Utah . She is also known from Mexico .
ecology
The host plants of Puccinia californica are different Cirsium 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 goes through a macrocyclical development cycle with Spermogonia, Aecien, Telien and Uredien. As an auto-ecologic parasite, it does not change host .
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .
Individual evidence
- ↑ GBIF Portal, accessed on February 7, 2013 ( Memento of the original from March 4, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. .
