Uromyces blandus
| Uromyces blandus | ||||||||||||
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| Uromyces blandus | ||||||||||||
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Uromyces blandus is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the reed . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants.
features
Macroscopic features
Uromyces blandus 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 blandus grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known. The cinnamon-brown uredia of the fungus usually grow on the upper side of the host leaves. Its deep golden to cinnamon-brown uredospores are 23–27 × 20–25 µm in size, mostly spherical to broadly ellipsoidal and spiky. The parts of the species, which predominantly grow on the upper side of the leaves, are black-brown, powdery and exposed early. The deep golden to chestnut brown teliospores are unicellular, usually spherical to ellipsoid and 25–34 × 19–24 µm in size. Their stalk is colorless to yellowish and up to 80 µm long.
distribution
The known distribution area of Uromyces blandus includes the Philippines . The species was also found in China.
ecology
The host plant of Uromyces blandus is Phragmites communis . 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 of which only Telien and Uredien and their host are known; Spermogonia and aecia could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .
Individual evidence
- ↑ Zhuang JY, Wei SX, 2001a. Some noteworthy tropical species of Uromyces from Hainan Island. Mycotaxon, 78: 349-351.