Puccinia praetermissa
| Puccinia praetermissa | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia praetermissa | ||||||||||||
| Parmelee |
Puccinia praetermissa is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the Korbblütlergattung Lagascea . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is a native of Mexico and Puerto Rico .
features
Macroscopic features
Puccinia praetermissa 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 praetermissa grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are not yet known. The uredia of the fungus growing on both sides of the host leaves are dark cinnamon brown. Their cinnamon-brown uredospores are 21–26 × 20–23 µm in size, ovate to broadly ellipsoidal and spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered. The dark chestnut brown teliospores are two-celled, usually broadly ellipsoidal to ellipsoidal, wrinkled and 35–45 × 23–30 µm in size. Their stem is colorless and up to 80 µm long.
distribution
The known distribution area of Puccinia praetermissa includes Sinaloa and Jalisco as well as Puerto Rico.
ecology
The host plants of Puccinia praetermissa are different Lagascea 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.
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
- ^ DF Farr, AY Rossman: Puccinia praetermissa. (No longer available online.) In: Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. Archived from the original on March 4, 2016 ; Retrieved February 8, 2013 . 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.
