Uredo ditissima
| Uredo ditissima | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uredo ditissima | ||||||||||||
| ( Syd. ) Cummins |
Uredo ditissima is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grasses Dendrocalamus latiflorus and Schizostachyum lumampoa . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in southern East Asia. Since only its secondary crop shape is knownso far, it is classified in the genus Uredo . Possibly it belongs to the teleomorph genus Dasturella .
features
Macroscopic features
Uredo ditissima 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 Uredo ditissima grows as with all Uredo TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia and aecia of the species are not known. The uredia of the fungus growing on the underside of the host leaves are brown and have yellowish to brownish paraphyses . Their cinnamon-brown uredospores are 23–27 × 28–38 µm in size, mostly ovate and spiky. The parts of the species are unknown.
distribution
The known distribution area of Uredo ditissima includes the Philippines and Taiwan .
ecology
The host plants of Uredo ditissima are Dendrocalamus latiflorus and Schizostachyum lumampoa . 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 presumably macrocyclical development cycle with Spermogonia, Aecien, Uredien and Telien. Due to the lack of aecia and spermogonia, it is not possible to determine whether it changes host .
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .