Puccinia porophylli
| Puccinia porophylli | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia porophylli | ||||||||||||
| Hennings |
Puccinia porophylli is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the daisy family genus Porophyllum . 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 porophylli 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 porophylli grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are known, but have not yet been described. The uredia of the fungus, which predominantly grow on the underside of the leaves, are light cinnamon brown. Their light yellow uredospores are 22–25 × 19–22 µm in size, almost spherical to broadly ellipsoidal and spiky. The leaves of the species growing on the underside of the leaves and on stems are black-brown, compact and uncovered, they have golden paraphyses. The deep chestnut-brown teliospores are two-celled, usually ovate to ellipsoidal, waisted and 35–44 × 24–27 µm in size. Their stem is colorless to brownish and up to 130 µm long.
distribution
The known distribution area of Puccinia porophylli extends from South America to central Mexico .
ecology
The host plants of Puccinia porophylli are different Porophyllum 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 .