Uromyces lupini
| Uromyces lupini | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces lupini | ||||||||||||
| Berk. & MA Curtis |
Uromyces lupini 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 western North America .
features
Macroscopic features
Uromyces lupini 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 lupini 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 small groups on the surface of the host leaves. The aecia of the species growing underneath the leaves are white and cup-shaped. Their yellowish to brown aeciospores are 21–29 × 18–24 µm in size, spherical to broadly ellipsoid and warty. The uredia of the fungus, growing on both or mostly underside of the leaves, are yellow-brown. The yellowish uredospores are 28–33 × 22–26 µm in size, ellipsoidal to broadly ellipsoidal and spiky. The parts of the species that grow on both or mainly underside of the leaf are black-brown, compact and uncovered. The chestnut-brown teliospores are unicellular, usually ovoid to broadly ellipsoidal, smooth and mostly 30–36 × 21–28 µm in size. Their stem is colorless and up to 80 µm long.
distribution
The known distribution area of Uromyces lupini includes western North America from British Columbia to central Mexico .
ecology
The host plants of Uromyces lupini are various 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 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 .