Puccinia eupatorii
| Puccinia eupatorii | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia eupatorii | ||||||||||||
| Dietel |
Puccinia eupatorii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of water fumes . 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 America and southern North America .
features
Macroscopic features
Puccinia eupatorii 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 eupatorii grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your spermogonia grow on both sides of the host leaves. The aecia of the species that grow underneath the leaves are chestnut brown and stand in groups around the spermogonia. They have 33–40 × 28–33 µm in size, broadly ovate to broadly ellipsoidal, almost chestnut brown aeciospores with a spiky surface. The uredia of the fungus, which usually grow on the underside of the leaves, are scattered. Your chestnut uredospores are 28–34 × 25–30 µm in size, broadly ovate to broadly ellipsoidal and spiny. The predominantly underside of the leaves of the species are black-brown, powdery and uncovered. The light chestnut brown teliospores are two-celled, usually broadly ovate to ellipsoidal and 40–52 × 30–34 µm in size. Their stem is colorless and up to 65 µm long.
distribution
The known distribution area of Puccinia eupatorii extends from South America to Mexico .
ecology
Host plants of Puccinia eupatorii are water fens. 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 with Spermogonia, Aecien, Telien and Uredien, but does not change host.
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .