Puccinia lagenophorae
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Puccinia lagenophorae on common ragwort |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia lagenophorae | ||||||||||||
| Cooke |
Puccinia lagenophorae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of ragweeds and Lagenophora species. Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Australia and Europe .
features
Macroscopic features
Puccinia lagenophorae 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 lagenophorae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia of the fungus are unknown. The cup-shaped aecia of the species grow in large orange groups on the stems and leaves of the host. Their orange aeciospores are 10–16 × 10–16 µm in size, slightly spherical and warty. The fungus apparently does not develop uredia . The scattered on the stems of host plants growing Telien the type are usually dark brown, powdery and long covered. The dark brown teliospores are one to two-celled, usually blunt-lobed to broadly ellipsoid, double or triple furrowed and 20–40 × 12–18 µm in size. Their stalk is colorless and 20–40 µm long.
distribution
The known distribution area of Puccinia lagenophorae includes Australia and Europe . It probably comes from Australia and from there reached Europe.
ecology
The host plants of Puccinia lagenophorae are various ragwort ( Senecio ) and Lagenophora 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 spermogonia, aecia and telia; Uredien are not trained. She does not change host.
literature
- Ernst Gäumann: The rust fungi of Central Europe. With special consideration of Switzerland . In: Contributions to the cryptogam flora in Switzerland . tape 12 . Commission publisher Buchdruckerei Büchler & Co, Bern 1959.