Puccinia miyoshiana
| Puccinia miyoshiana | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia miyoshiana | ||||||||||||
| Dietel |
Puccinia miyoshiana is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of rabbit ears and various sweet grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in large parts of North Asia.
features
Macroscopic features
Puccinia miyoshiana 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 Puccinia miyoshiana grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The cylindrical aecia of the species have 22-25 × 22-25 µm large, spherical, hyaline aeciospores with a wrinkled surface. The light, cinnamon-brown uredia of the fungus grow on the underside of the host leaves and are up to 0.8 mm long. Their golden to light cinnamon-brown uredospores are 22–26 × 19–23 µm in size, spherical to broadly oval and finely spiky. The parts of the species growing underneath the leaves are black-brown, powdery and exposed early; they are up to 5 mm long. The chestnut-brown teliospores are one to two-celled, usually broad to long ellipsoid and 30–43 × 19–26 µm in size. Their stalk is hyaline to yellowish and up to 100 µm long.
distribution
The known distribution area of Puccinia miyoshiana extends from western Russia to China and Japan .
ecology
The host plants of Puccinia miyoshiana are for haplonts rabbit ears ( Bupleurum spp.) And Capillipedium parviflorum , Eccoiloptus cotulifer and Spodiopogon sibiricus for dikaryotic . 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 has a development cycle with Telien, Uredien, Aecien and Spermogonia and changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .