Puccinia ludovicianae
| Puccinia ludovicianae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia ludovicianae | ||||||||||||
| Fahrendorff |
Puccinia ludovicianae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the genus Artemisia . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in large parts of North America .
features
Macroscopic features
Puccinia ludovicianae 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 ludovicianae 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 the underside of the host leaves are cinnamon-brown and have paraphyses. Their golden to cinnamon-brown uredospores are 28–35 × 25–28 µm in size, ovate to broadly ellipsoidal and spiky. The parts of the species growing underneath the leaves are black-brown, compact and uncovered, they have paraphyses. The clear maroon teliospores are two-celled, usually long ovate to long ellipsoidal, wrinkled and 46–58 × 22–28 µm in size. Their stem is colorless and up to 115 µm long.
distribution
The known distribution area of Puccinia ludovicianae extends from Mexico to Canada .
ecology
The host plants of Puccinia ludovicianae are various Artemisia 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 .