Puccinia electrae
| Puccinia electrae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia electrae | ||||||||||||
| Dietel & Holway |
Puccinia electrae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Coreopsis mutica . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Central America .
features
Macroscopic features
Puccinia electrae 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 electrae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are so far unknown. The uredia of the fungus growing on both sides or predominantly on top of the host leaves are cinnamon brown. Their light cinnamon-brown to golden uredospores are 27–33 × 22–26 µm in size, ovate to broadly ellipsoidal and spiky. The parts of the species growing on both sides or mostly on the top of the leaves are black-brown, powdery and uncovered. The chestnut-brown teliospores are two-celled, as a rule broadly ellipsoidal to ellipsoidal, warty and usually 42–48 × 25–32 µm in size. Their stem is colorless and up to 100 µm long.
distribution
The known distribution area of Puccinia electrae includes the south of Mexico and Guatemala .
ecology
The host plant of Puccinia electrae is Coreopsis mutica . 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 macrocyclical development cycle with Spermogonia, Aecien, Telien and Uredien. As a self-sufficient parasite, it does not change host .
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .