Puccinia seorsa
| Puccinia seorsa | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia seorsa | ||||||||||||
| Jackson & Holway |
Puccinia seorsa is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Piptocarpha chontalensis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in South and Central America .
features
Macroscopic features
Puccinia seorsa 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 Puccinia seorsa grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow gregariously on the upper side of the host leaves. The aecia of the species, growing in groups on the underside of the leaves, are short-cylindrical and yellowish. They have 30–36 × 27–30 µm in size, spherical to lemon-shaped and hyaline to light yellowish aeciospores with a fine warty surface. The chestnut uredia of the mushroom grow on the underside of the leaves. Your chestnut brown uredospores are 30–35 × 29–33 µm in size, mostly spherical and spiky. The parts of the species that grow underneath the leaves are chestnut brown, compact and uncovered. The deep golden or light chestnut brown teliospores are two-celled, usually spindle-shaped and cylindrical and 70–115 × 20–26 µm in size. Their stem is colorless and up to 115 µm long.
distribution
The known distribution area of Puccinia seorsa includes Guatemala and Brazil .
ecology
The host plant of Puccinia seorsa is Piptocarpha chontalensis . 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 development cycle with Spermogonia, Aecien, Telien and Uredien.
literature
- George Baker Cummins : The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .