Puccinia aegopogonis
| Puccinia aegopogonis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia aegopogonis | ||||||||||||
| Arthur & Holway |
Puccinia aegopogonis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of water dost and of the sweet grass genus Aegopogon . 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 and Central America .
features
Macroscopic features
Puccinia aegopogonis 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 aegopogonis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia of the species are short cylindrical. The aecia of the species have 19–36 × 15–26 µm large, angular-spherical to ellipsoidal, hyaline aeciospores with a wrinkled surface. The yellow-brown uredia of the species usually grow on the underside of the leaves of the host plant. Their yellow to golden uredospores are usually broadly ellipsoidal, 24–29 × 22–25 µm in size and finely spiky. The parts of the species, mostly growing on the underside of the leaves and on sheaths, are blackish, small and uncovered early. The hazelnut-brown teliospores of the fungus are two-celled, horizontally to vertically septate, usually broad ellipsoid and 27–31 × 23–28 µm in size. Their stalk is yellowish and up to 55 µm long.
distribution
The known distribution area of Puccinia aegopogonis extends from Mexico to Guatemala to northern South America .
ecology
The host plants of Puccinia aegopogonis are for haplonts Wasserdoste ( Eupatorium spp.) And Aegopogon cenchroides and A. tenellus 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, 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 .