Puccinia artemisiae-norvegicae
| Puccinia artemisiae-norvegicae | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia artemisiae-norvegicae | ||||||||||||
| Tranzschel & Voronikhin |
Puccinia artemisiae-norvegicae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Artemisia arctica . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It iswidespread in the Holarctic .
features
Macroscopic features
Puccinia artemisiae-norvegicae 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 artemisiae-norvegicae 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. Their golden to cinnamon-brown uredospores are 30–35 × 21–25 µm in size, ovate to broadly ellipsoidal and spiky. The parts of the species growing on both sides and on stems are black-brown, powdery and uncovered, they have paraphyses. The chestnut-brown teliospores are two-celled, usually ellipsoidal to long-ellipsoidal, wrinkled and 33–38 × 19–24 µm in size. Their stem is colorless.
distribution
The known distribution area of Puccinia artemisiae-norvegicae extends from Canada to Russia .
ecology
The host plant of Puccinia artemisiae-norvegicae is Artemisia arctica . 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 .