Puccinia punctoidea
| Puccinia punctoidea | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia punctoidea | ||||||||||||
| P. Sydow & Sydow |
Puccinia punctoidea is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Viguiera pringlei . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Mexico .
features
Macroscopic features
Puccinia punctoidea 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 punctoidea grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are unknown, the same applies to the uredia of the fungus. Their golden-yellow uredospores are 24–29 × 24–29 µm in size, mostly spherical and spiky. The bilateral growing parts of the species are dark chocolate brown, powdery and uncovered. The clear maroon teliospores are two-celled, usually long ovate and 33–43 × 21–27 µm in size. Their stem is colorless and up to 75 µm long.
distribution
The known distribution area of Puccinia punctoidea only includes Mexico .
ecology
The host plant of Puccinia punctoidea is Viguiera pringlei . 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 goes through a development cycle of which only Telien and Uredien and their host are known so far; Spermogonia and Aecien could not be assigned to her.
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .