Puccinia irregularis
| Puccinia irregularis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia irregularis | ||||||||||||
| Dietel |
Puccinia irregularis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the Korbblütlergattung Verbesina . 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 and Central America .
features
Macroscopic features
Puccinia irregularis can only be recognized with the naked eye by means of the spore beds emerging 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 irregularis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are unknown. The uredia of the mushroom growing on the underside of the leaves are light cinnamon brown. Their cinnamon-brown uredospores are 24–29 × 20–24 µm in size, mostly egg-shaped to ellipsoidal and spiky. The parts of the species growing underneath the leaves are black-brown and later uncovered. The clear maroon teliospores are two-celled, usually long ovate and 40–53 × 22–29 µm in size. Their stem is golden and up to 70 µm long.
distribution
The known distribution area of Puccinia irregularis extends from South America to central Mexico and the United States.
ecology
The host plants of Puccinia irregularis are different Verbesina 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 development cycle of which only Telien and Uredien and their host are known so far; Spermogonia and Aecien could not be assigned to her.
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: Ocurrence Search. Retrieved on January 29, 2013 ( Memento of the original from January 31, 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. .
