Puccinia andropogonis
| Puccinia andropogonis | ||||||||||||
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Puccinia andropogonis on toothache wood ( Zanthoxylum americanum ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia andropogonis | ||||||||||||
| Schweinitz |
Puccinia andropogonis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of I-Eurosids and of the sweet grass genus Andropogon . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in North and Central America .
features
Macroscopic features
Puccinia andropogonis can only be recognized with the naked eye by 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 andropogonis 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 16–30 × 15–24 µm large, hyaline aeciospores with a wrinkled surface. The cinnamon-brown uredia of the fungus usually grow on the underside of the host leaves and are a maximum of 0.5 mm long. Their light yellowish uredospores are 21–25 × 20–23 µm in size, flattened or round, spherical to broadly ellipsoidal and finely spiky. The parts of the species, mostly growing underneath the leaves, are hazelnut brown and powdery. They are up to 2 mm long and often flow together. The also hazel-brown teliospores are two-celled, usually club-shaped to long ellipsoid and 30–44 × 16–21 µm in size. Its stem is yellowish to colorless and up to 70 µm long.
distribution
The known distribution area of Puccinia andropogonis stretches from Guatemala to Canada .
ecology
The host plants of Puccinia andropogonis are for haplonts various I-euro aid surfactants and Andropogon - grasses for dikaryotic . 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, Aecien and Spermogonia 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 .
