Puccinia schoenanthi
| Puccinia schoenanthi | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia schoenanthi | ||||||||||||
| Cummins & Guyot |
Puccinia schoenanthi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grasses Cymbopogon oliviera and camel grass ( Cymbopogon schoenanthus ). Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is an endemic of Iran .
features
Macroscopic features
Puccinia schoenanthi 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 schoenanthi grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known. The cinnamon-brown uredia of the fungus grow on the underside of the host leaves. Your chestnut uredospores are 23–26 × 20–24 µm in size, spherical to ovoid and finely warty. The parts of the species that grow on the underside of the leaves are black-brown, compact, powdery and exposed early. The chestnut-brown teliospores are two-celled, ovate to ellipsoid and 42–48 × 26–30 µm in size. Their stem is colorless and up to 130 µm long.
distribution
The known distribution area of Puccinia schoenanthi only includes Iran .
ecology
The host plants of Puccinia schoenanthi are Cymbopogon oliviera and camel grass ( Cymbopogon schoenanthus ). 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 and their host are known; Spermogonia and aecia could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .