Uromyces acuminatus
| Uromyces acuminatus | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces acuminatus | ||||||||||||
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Uromyces acuminatus is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite of clove plants , Primelgewächsen , lily family and blocking herb plants as well as Spartina - grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in much of North America .
features
Macroscopic features
Uromyces acuminatus can only be recognized with the naked eye by 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 acuminatus grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species have 17–28 × 15–24 µm large, hyaline aeciospores with a warty surface. The yellow-brown uredia of the fungus grow on the upper side of the host leaves. Their yellowish to light golden uredospores are 27–32 × 23–28 µm in size, mostly broad ellipsoid and spiny. The parts of the species are black-brown, powdery, and uncovered in the morning; they usually have numerous paraphyses. The golden to chestnut-brown teliospores are unicellular, usually ovate to oblong and 26–36 × 15–20 µm in size. Their stalk is yellowish and up to 70 µm long.
distribution
The known distribution area of Uromyces acuminatus includes the USA and Canada .
ecology
The host plants of Uromyces acuminatus for the haplonts are clove family , primrose family , lily family and sparaceae family as well as various Spartina species for the dikaryote . 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 development cycle with spermogonia, Aecien, Telien and Uredien and completes a host change .
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .