Puccinia concinna
| Puccinia concinna | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia concinna | ||||||||||||
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Puccinia concinna is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Eupatorium greggii . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in southern North America .
features
Macroscopic features
Puccinia concinna 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 concinna grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia and aecia of the species are not known, the same applies to the uredia of the fungus. The uredospores are cinnamon-brown, spiky, usually ovoid to broadly ellipsoidal and mostly 23–27 × 20–24 µm in size. The parts of the species growing predominantly on the underside of the surface of the host plants are brown, compact and uncovered. The chestnut-brown teliospores are two-celled, usually long ellipsoidal to ellipsoidal and usually 40–52 × 25–32 µm in size. Their stem is colorless and up to 170 µm long.
distribution
The well-known distribution area of Puccinia concinna extends from Arizona in the USA to Chihuahua in Mexico .
ecology
The host plant of Puccinia concinna is the water species Eupatorium greggii . 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 .