Uromyces ehrhartae-giganteae

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Uromyces ehrhartae-giganteae
Systematics
Subdivision : Pucciniomycotina
Class : Pucciniomycetes
Order : Rust mushrooms (Pucciniales)
Family : Pucciniaceae
Genre : Uromyces
Type : Uromyces ehrhartae-giganteae
Scientific name
Uromyces ehrhartae-giganteae
Doidge

Uromyces ehrhartae-giganteae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Ehrharta gigantea . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to South Africa .

features

Macroscopic features

Uromyces ehrhartae-giganteae 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 ehrhartae-giganteae grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia and aecia of the species are not known, the same applies to the uredia of the fungus. The parts of the species, which predominantly grow on stems, are chocolate brown, pillow-shaped and loosely tomentose. The golden to chestnut brown teliospores are unicellular, usually ovoid to long ellipsoid and 26–36 × 19–24 µm in size. Their stem is colorless and up to 160 µm long.

distribution

The known distribution area of Uromyces ehrhartae-giganteae only includes South Africa .

ecology

The host plant of Uromyces ehrhartae-giganteae is Erharta gigantea . 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 their host are known; Uredien, Spermogonia and Aecien could not be assigned to her.

literature

  • George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .