Uromyces montanus
| Uromyces montanus | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces montanus | ||||||||||||
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Uromyces montanus is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of lupins . 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 montanus 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 montanus grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia of the species grow in small groups on the underside of the host leaves. The aecia of the species growing underneath the leaves are short and light yellowish, they are in small groups. Their yellowish aeciospores are 30–38 × 20–26 µm in size, broadly ellipsoidal to ellipsoidal and warty. Uredien are not developed by the species. The leaves of the species growing in groups on the underside of the leaves are cinnamon-brown, compact and uncovered. The light golden brown teliospores are unicellular, usually long ellipsoidal to ellipsoidal, warty and mostly 29–40 × 17–22 µm in size. Their stalk is hyaline and up to 65 µm long.
distribution
The known distribution area of Uromyces montanus extends from southern Mexico to Costa Rica and Guatemala .
ecology
The host plants of Uromyces montanus are various types of lupins ( Lupinus spp.). 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 probably microcyclical development cycle with spermogonia, aecia and teliae and 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 .