Puccinia annulatipes
| Puccinia annulatipes | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia annulatipes | ||||||||||||
| Cummins |
Puccinia annulatipes is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sunflower genus Notoptera . 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 annulatipes 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 annulatipes grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow on the upper side of the surfaces of the host leaves. The aecia of the species are unknown. The fungus lacks uredia . The parts of the species growing underneath the leaves are black-brown, gregarious and uncovered. The chestnut-brown teliospores are two-celled, usually ellipsoidal to broadly ellipsoidal, spiky and usually 30–38 × 22–25 µm in size. Their stem is colorless and up to 85 µm long.
distribution
The known distribution area of Puccinia annulatipes only includes the type locality south of Puerto Vallarta .
ecology
The host plant of Puccinia annulatipes is an unspecified Notoptera 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 microcyclic development cycle with spermogonia, aecia and telia. As an auto-ecologic 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 .