Puccinia maculosa
| Puccinia maculosa | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia maculosa | ||||||||||||
| Pig. |
Puccinia maculosa is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of wall lettuce . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Eurasia .
features
Macroscopic features
Puccinia maculosa 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 maculosa grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow on both sides of the host leaves and are relatively large. The aecia of the species growing on the underside of the leaves and on the petioles are first hemispherical, then flattened and whitish to yellow. Their light orange aeciospores are 13–24 × 13–24 µm in size, spherical to ellipsoid and fine-black. The uredia of the fungus growing on the underside of the leaves are light brown, scattered and powdery. Their light brown uredospores are roughly spherical, 16–24 × 16–24 µm in size and spiky. The parts of the species that grow underneath the leaves are black-brown and powdery. The brown teliospores are two-celled, usually ellipsoidal, finely warty and 26–36 × 16–24 µm in size. Their stem is colorless and short.
distribution
The known distribution area of Puccinia maculosa includes Eurasia .
ecology
The host plant of Puccinia maculosa is the wall lettuce ( Mycelis muralis ). 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 Aecien, Spermogonia, Uredien and Telien and 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.