Uredo palmifoliae
| Uredo palmifoliae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uredo palmifoliae | ||||||||||||
| Cummins |
Uredo palmifoliae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Setaria palmifolia and Ophiuros corymbosus . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to New Guinea . Since only its secondary crop shape is knownso far, it is classified in the genus Uredo . It may belong to the teleomorph genus Phakposora or Physopella .
features
Macroscopic features
Uredo palmifoliae 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 Uredo palmifoliae 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 both sides or mainly underside on the host leaves, are golden and have colorless to pale yellowish paraphyses . Their yellowish to light brownish uredospores are 21–27 × 17–20 µm in size, mostly ovate to broadly ellipsoidal and spiky. The parts of the species are unknown.
distribution
The known distribution area of Uredo palmifoliae only includes New Guinea .
ecology
The host plant of Uredo palmifoliae is Setaria palmifolia . 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 .