Puccinia acetosae
| Puccinia acetosae | ||||||||||||
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Puccinia acetosae on common sorrel |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia acetosae | ||||||||||||
| ( Schumach. ) Grain. |
Puccinia acetosae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of a vaccine . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It iswidespread in the Palearctic .
features
Macroscopic features
Puccinia acetosae 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 acetosae 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 uredia of the fungus growing on both sides of the host leaves are brown, scattered and uncovered early on. Their yellow-brown uredospores are 18–24 × 24–31 µm in size, spherical to ovoid and slightly spiky. The parts of the species growing underneath the leaves are small, round, black-brown and long covered, they have brownish paraphyses. The yellow-brown teliospores are two-celled, usually ellipsoidal to ovate, warty and 28–42 × 19–26 µm in size. Their stem is colorless and up to 35 µm long.
distribution
The known distribution area of Puccinia acetosae includes the entire Palearctic .
ecology
The host plants of Puccinia acetosae are various dockers ( Rumex 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 and Uredien are known; it is therefore not known whether it will 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.
