Puccinia guardiolae
| Puccinia guardiolae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia guardiolae | ||||||||||||
| Dietel & Holway |
Puccinia guardiolae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the daisy family genus Guardiola . 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 guardiolae 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 guardiolae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are not yet known. The uredia of the mushroom growing on the underside of the leaves are cinnamon brown. Their dark cinnamon-brown uredospores are 26–30 × 19–26 µm in size, broadly ellipsoidal to spherical and spiky. The parts of the species growing underneath the leaves are light cinnamon brown, compact and uncovered. The light golden-brown teliospores are two-celled, usually elongated ellipsoidal and 42–60 × 19–23 µm in size. Their stem is colorless and up to 80 µm long.
distribution
The known distribution area of Puccinia guardiolae only includes Mexico .
ecology
The host plants of Puccinia guardiolae are different Guardiola 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 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 .