Puccinia substriata
| Puccinia substriata | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia substriata | ||||||||||||
| Ellis & Bartholomew |
Puccinia substriata is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of nightshade and various millets . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in America, Hawaii and Uganda .
features
Macroscopic features
Puccinia substriata 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 substriata 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 aeciospores 26–31 × 18–23 µm in size with a wrinkled surface. The cinnamon-brown uredia of the species grow on both sides of the leaves of the host plants. Their cinnamon - brown uredospores are ellipsoidal to ovate, 24–31 × 24–27 µm in size and finely spiky. The mostly underside growing parts of the species are black-brown and uncovered early. The golden to light hazelnut-brown teliospores are two-celled, usually long ellipsoidal to club-shaped and 34–50 × 20–26 µm in size. Their stalk is yellowish to colorless and up to 30 µm long.
distribution
The known distribution area of Puccinia substriata includes the subtropical and tropical America, Hawaii and Uganda .
ecology
The host plants of Puccinia substriata are for the haplonts nightshade ( Solanum spp.) And Beckeropsis unisetum as well as various Panicum , Setarium , Digitaria , Paspalum and Pennisetum species for the dicaryont . 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 with Telien, Uredien, Spermogonia and Aecien and changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .