Puccinia ribis
| Puccinia ribis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia ribis | ||||||||||||
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Puccinia ribis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of currants . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common all over the northern hemisphere.
features
Macroscopic features
Puccinia ribis 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 ribis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Spermogonia and aecia of the species are unknown. The same applies to uredia of the mushroom. The parts of the species growing underneath the leaves are small, round, black-brown and long covered, they have brownish paraphyses. The chestnut-brown teliospores are two-celled, usually ellipsoidal to elongated, warty and 18–40 × 13–22 µm in size. Their stalk is colorless and about the length of the spores.
distribution
The known distribution area of Puccinia ribis includes the entire northern hemisphere and corresponds to that of its host genus.
ecology
The host plants of Puccinia ribis are currants ( Ribes spp.). 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 of which only Telien are known so far.
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.