Puccinia festucae
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| Puccinia festucae | ||||||||||||
| Plowright |
Puccinia festucae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the honeysuckle and the sweetgrass - genus Festuca . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It iswidespread in the Holarctic .
features
Macroscopic features
Puccinia festucae can only be recognized by the naked eye from 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 festucae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species have 17–21 × 20–27 µm large aeciospores with a wrinkled surface. The yellow uredia of the species grow on the upper side of the leaves of the host plant. Their yellowish to golden uredospores are spherical to broadly ellipsoidal, 24–29 × 22–25 µm in size and finely spiky. The parts of the species that grow on the top of the leaves are black-brown and uncovered early. The deep golden to light hazelnut brown teliospores of the fungus are two-celled, usually elongated to club-shaped and 42–58 × 15–18 µm in size. Their stem is brownish and up to 20 µm long.
distribution
The known distribution area of Puccinia festucae extends from Alaska via Korea and India to Europe.
ecology
The host plants of Puccinia festucae are for haplonts various honeysuckle ( Lonicera spp.) And Festuca TYPES 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, Spermogonia and Aecien and changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .