Puccinia operta
| Puccinia operta | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia operta | ||||||||||||
| ( Sydow & Sydow ) Mundkur & Thirumalachar |
Puccinia Operta is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite of Job's Tears ( Coix lacryma-jobi ). Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is native to Southeast Asia .
features
Macroscopic features
Puccinia operta can only be recognized with the naked eye by means of the spore beds emerging 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 Operta 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 both sides of the leaf surfaces of the host plant. Your cinnamon - brown uredospores are ovate, 27–34 × 20–25 µm in size and finely spiky. The parts of the species are black-brown, exposed early and compact. The hazelnut-brown teliospores are two-celled, usually ellipsoidal to elongated ellipsoidal and 29–36 × 23–30 µm in size; its stem is yellow to brownish and up to 110 µm long.
distribution
The well-known distribution area of Puccinia operta extends from New Guinea over the Philippines to India and Sri Lanka .
ecology
The host plant of Puccinia Operta is the Job's Tears ( Coix lacryma-jobi ). 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 B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .