Uredo mexicensis
Uredo mexicensis | ||||||||||||
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Uredo mexicensis | ||||||||||||
Cummins |
Uredo mexicensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the legume Leucaena macrophylla . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Mexico . Since only its secondary crop shape is knownso far, it is classified in the genus Uredo .
features
Macroscopic features
Uredo mexicensis 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 mexicensis 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 in groups on the host leaves, are covered and cinnamon-brown, they have paraphyses . Their golden-brown uredospores are 23–29 × 13–17 µm in size, egg-shaped and spiky. The parts of the species are unknown.
distribution
The known distribution area of Uredo mexicensis only includes Mexico .
ecology
The host plant of Uredo mexicensis is Leucaena macrophylla . 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 : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .