Puccinia tripsaci
| Puccinia tripsaci | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia tripsaci | ||||||||||||
| Ellis & Bartholomew |
Puccinia tripsaci is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite of ceanothus TYPES ( Ceanothus ) and of Andropogon - and Tripsacum - grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in southern North America .
features
Macroscopic features
Puccinia tripsaci 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 tripsaci grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species have 19–24 × 18–21 µm large, hyaline aeciospores with a wrinkled surface. The cinnamon-brown uredia of the species usually grow on the underside of the leaves of the host plants. Their golden to cinnamon - brown uredospores are spherical, 26–30 × 26–30 µm in size and finely spiky. The mostly underside growing parts of the species are black-brown, powdery and uncovered early. The hazel-brown teliospores are two-celled, usually broadly ellipsoidal to ovoid and 30–40 × 22–27 µm in size. Their stalk is yellowish and up to 90 µm long.
distribution
The known distribution area of Puccinia tripsaci includes North America from the southern USA to Mexico .
ecology
The host plants of Puccinia tripsaci are for the Haplonts Ceanothus species and Tripsacum and Andropogon species for the dikaryote . 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 has a development cycle of which only Telien and Uredien and their host are known; Spermogonia and aecia could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .