Puccinia magnusiana
| Puccinia magnusiana | ||||||||||||
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Puccinia magnusiana on reeds |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia magnusiana | ||||||||||||
| Koernicke |
Puccinia magnusiana is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of buttercups and sweet grasses of the Arundineae tribe . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is spread all over the world.
features
Macroscopic features
Puccinia magnusiana can only be recognized with the naked eye by means of 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 magnusiana grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia grow scattered on the leaves of the host and have 23–26 × 21–23 µm large aeciospores with a wrinkled surface. The yellow-brown uredia of the fungus grow on both sides of the leaf surfaces of the host plant. Their colorless to brownish yellow uredospores are long ellipsoidal to oval, 26–35 × 16–19 µm in size and finely spiky. The branches growing on both sides are black-brown, uncovered early and compact. The hazelnut-brown teliospores are two-celled, variably shaped and 42–56 × 15–24 µm in size; their stalk is hyaline to brownish and up to 95 µm long.
distribution
The known distribution area of Puccinia magnusiana covers the entire world.
ecology
The host plants of Puccinia magnusiana are for the haplonts buttercup family and for the dikaryotes sweet grasses of the tribe Arundineae ( stilted reed and phragmites species). 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 et al. 1971, ISBN 3-540-05336-0 .
