Puccinia opuntiae
| Puccinia opuntiae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia opuntiae | ||||||||||||
| Arthur & Holway |
Puccinia opuntiae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Bouteloua simplex . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in northwestern South America .
features
Macroscopic features
Puccinia opuntiae can only be recognized with the naked eye from 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 opuntiae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known. The light cinnamon-brown uredia of the mushroom grow on the upper side of the host leaves. Their golden to light cinnamon brown uredospores are 20–26 × 19–26 µm in size, mostly spherical to broadly ellipsoidal and warty. The bilateral growing parts of the species are blackish, powdery and exposed early. The dark maroon teliospores are one to two-celled, usually broad ellipsoid and 26–45 × 19–26 µm in size. Their stem is golden and up to 130 µm long.
distribution
The known distribution area of Puccinia opuntiae includes Bolivia and Peru .
ecology
The host plant of Puccinia opuntiae is for the dikaryote Bouteloua simplex ; the haplont possibly grows on opuntia ( Opuntia spp.). 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 1971, ISBN 3-540-05336-0 .