Puccinia sessilis
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Aecien of Puccinia sessilis on spotted arum |
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| Scientific name | ||||||||||||
| Puccinia sessilis | ||||||||||||
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Puccinia sessilis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite of Philodendron , Sword lily plants , lily family and orchids as well as Schwingeln and gloss grasses . 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 sessilis 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 sessilis 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 18-25 × 15-20 µm in size, ellipsoidal to spherical and hyaline- yellowish aeciospores. The cinnamon-brown uredia of the species grow on both sides of the leaves of the host plant. Their golden to cinnamon brown uredospores are usually broadly ellipsoidal to ovate, 27–32 × 22–26 µm in size and finely spiky. The bilateral growing parts of the species are black and long covered. The light hazelnut-brown teliospores of the fungus are two-celled, usually long club-shaped to oblong and 40–56 × 18–23 µm in size. Their stalk is brownish and up to 15 µm long.
distribution
The known distribution area of Puccinia sessilis includes the entire Holarctic .
ecology
The host plants of Puccinia sessilis are for the haploid Aronstabgewächse (spp Araceae.), Sword lily family (Iridaceae spp.), Lily family (Liliaceae spp.) And orchid (Orchidaceae spp.) And fescue ( Festuca spp.) For the 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 et al. 1971, ISBN 3-540-05336-0 .
