Puccinia balsamorrhizae
| Puccinia balsamorrhizae | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia balsamorrhizae | ||||||||||||
| Peck |
Puccinia balsamorrhizae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sunflower genera Balsamorhiza and Wyethia . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in much of North America .
features
Macroscopic features
Puccinia balsamorrhizae 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 balsamorrhizae 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 leaf veins of the host leaves. The aecia of the species that grow on both sides are chocolate brown and can also be found along the veins. Their cinnamon to almost chestnut brown aeciospores are 27–36 × 23–31 µm in size, spherical to broadly ellipsoidal and spiky. The uredia of the mushroom, growing on both sides, are scattered and chocolate brown. Their chestnut or cinnamon brown uredospores are 27–36 × 23–31 µm in size, spherical to broadly ellipsoidal and spiky. The bilateral growing parts of the species are chocolate brown, powdery and uncovered. The chestnut-brown teliospores are one to two-celled, usually long ellipsoid to ellipsoid, wrinkled and usually 33–44 × 20–26 µm in size. Their stem is colorless.
distribution
The known distribution area of Puccinia balsamorrhizae covers roughly the temperate western half of North America.
ecology
The host plants of Puccinia balsamorrhizae are various Balsamorhiza and Wyethia 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. As an auto-ecologic parasite, it does not change host .
References
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .
- Charles Horton Peck: New Species of Fungi . In: Bulletin of the Torrey Botanical Club . tape 11 (3) . Tucson 1884, p. 49-50 .
Individual evidence
- ↑ Peck 1884, p. 49.