Uredo kriegeriana
| Uredo kriegeriana | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uredo kriegeriana | ||||||||||||
| Sydow & Sydow |
Uredo kriegeriana is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of hemp ( Cannabis sativa ). Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Saxony . Since only its secondary crop shape is knownso far, it is classified in the genus Uredo .
features
Macroscopic features
Uredo kriegeriana can only be recognized with the naked eye by 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 Uredo kriegeriana grows as with all Uredo TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia and aecia of the species are not known. The uredia of the fungus growing on the underside of the host leaves are in loose groups. Their orange uredospores are 21–27 × 15–2 µm in size, mostly approximately spherical to ellipsoid and smooth. The parts of the species are unknown.
distribution
The known distribution area of Uredo kriegeriana only includes Saxon Switzerland .
ecology
The host plant of Uredo kriegeriana is hemp ( Cannabis sativa ). 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 goes through a presumably macrocyclical development cycle with Spermogonia, Aecien, Uredien and Telien. Due to the lack of aecia and spermogonia, it is not possible to determine whether it changes 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.