Puccinia boutelouae
| Puccinia boutelouae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia boutelouae | ||||||||||||
| ( Jennings ) Holway |
Puccinia boutelouae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of various sweet grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in tropical and subtropical America .
features
Macroscopic features
Puccinia boutelouae 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 boutelouae 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 uredia of the fungus grow on both sides of the host leaves. Their colorless to yellowish uredospores are 16–23 × 15–19 µm in size, spherical to ovoid and finely spiky. The bilateral growing parts of the species are blackish and powdery. The hazelnut-brown teliospores are two-celled, often obliquely septate, broadly ellipsoid and 25–33 × 20–27 µm in size. Their stem is colorless to golden and up to 120 µm long.
distribution
The known distribution area of Puccinia boutelouae extends from Brazil via Panama and Puerto Rico to the southwestern continental USA .
ecology
The host plants of Puccinia boutelouae are Cathestecum erectum , Gymnopogon foliosus and various Bouteloua species. 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 .