Uromyces illotus
Uromyces illotus | ||||||||||||
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Uromyces illotus | ||||||||||||
Arthur & Holw. |
Uromyces illotus is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the legume Mucuna andreana . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Guatemala .
features
Macroscopic features
Uromyces illotus 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 Uromyces illotus grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia and aecia of the species are unknown. The uredia of the fungus growing on the underside of the host leaves are cinnamon brown. Their uredospores, which are also cinnamon-brown, are 25–28 × 19–23 µm in size, mostly ovate and spiky. The parts of the species that grow underneath the leaves are black-brown, uncovered early on and compact. The chestnut-brown teliospores are unicellular, usually ovoid to broadly ellipsoid, warty and mostly 25–29 × 20–24 µm in size. Their stem is colorless and up to 45 µm long.
distribution
The known distribution area of Uromyces illotus only includes Guatemala .
ecology
The host plant of Uromyces illotus is Mucuna andreana . 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 probably macrocyclical development cycle of which only uredia and telia and their host are known so far. It cannot therefore be said whether she will change 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 .