Uromyces montanoae
| Uromyces montanoae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces montanoae | ||||||||||||
| Arthur & Holw. |
Uromyces montanoae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the Korbblütlergattung Montanoa . 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
Uromyces montanoae 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 Uromyces montanoae grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow on the upper side in dense groups on the surface of the host leaves. The aecia of the species growing opposite them are cinnamon-brown. The uredia of the mushroom growing on the underside of the leaves are cinnamon brown. The uredospores, which are also cinnamon-brown, are 24–27 × 22–26 µm in size, triangular, ovate to broadly ellipsoidal and spiky. The parts of the species that grow underneath the leaves are cinnamon-brown, compact and uncovered. The golden to light cinnamon-brown teliospores are unicellular, usually ovoid, smooth and mostly 32–42 × 18–22 µm in size. Their stem is almost colorless and up to 50 µm long.
distribution
The known distribution area of Uromyces montanoae extends from Costa Rica to Guatemala .
ecology
The host plants of Uromyces montanoae are Montanoa dumicola , M. hibiscifolia and M. pittieri . 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 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 .