Uromyces lespedezae procumbentis
| Uromyces lespedezae procumbentis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces lespedezae procumbentis | ||||||||||||
| ( Pig. ) MA Curtis |
Uromyces LESPEDEZAE-procumbentis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of bush clover . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in eastern North America .
features
Macroscopic features
Uromyces lespedezae-procumbentis 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 LESPEDEZAE-procumbentis grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow in small groups on the upper side of the surface of the host leaves. The aecia of the species that grow underneath the leaves grow in small groups and are yellow. Their hyaline aeciospores are 16–19 × 15–18 µm in size, spherical and warty. The uredia of the fungus, which mostly grow on the underside of the leaves, are cinnamon-brown, small and bordered by paraphyses. The yellowish to golden uredospores are 19–22 × 16–18 µm in size, broadly ellipsoidal and spiky. The parts of the species growing underneath the leaves are dark cinnamon-brown, compact and uncovered. The golden to light chestnut brown teliospores are unicellular, usually oblong to ellipsoidal to long ellipsoidal, smooth and usually 24–32 × 14–17 µm in size. Their stem is colorless and up to 85 µm long.
distribution
The known distribution area of Uromyces lespedezae-procumbentis extends from Ontario to the eastern half of the USA .
ecology
The host plants of Uromyces lespedezae-procumbentis are various bush clover ( Lespedeza 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 .