Puccinia longissima
| Puccinia longissima | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia longissima | ||||||||||||
| Schröter |
Puccinia longissima is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of sedum and rhodiola species as well as Schiller grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in the western Palearctic .
features
Macroscopic features
Puccinia longissima 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 longissima growing as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The systemically growing aecia of the species have 24–27 × 21–24 µm large, spherical to elongated, hyaline to yellowish aeciospores. The yellow-brown uredia of the species usually grow on the upper side of the leaves of the host plant. Their golden to yellowish uredospores are usually spherical to ovate, 25–29 × 23–26 µm in size and finely spiky. The parts of the species, mostly growing on the upper side of the leaves, are black-brown, compact and uncovered early. The hazelnut-brown teliospores of the fungus are two-celled, usually cylindrical to long club-shaped and 70–100 × 17–22 µm in size. Their stem is brownish and up to 25 µm long.
distribution
The known distribution area of Puccinia longissima includes Europe and North Africa.
ecology
The host plants of Puccinia longissima are for haplonts sedum ( Sedum spp.) And Rhodiolum spp. and schiller grasses ( Koeleria spp.) for the dikaryote . 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 .