Uromyces calopogonii
| Uromyces calopogonii | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces calopogonii | ||||||||||||
| Cummins |
Uromyces calopogonii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the legume Calaopogonium galactioides . 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 calopogonii 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 calopogonii 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 yellow-brown. Their golden to cinnamon-brown uredospores are 17–20 × 16–18 µm in size, mostly spherical to broadly ellipsoidal and spiky. The parts of the species growing underneath the leaves are chestnut brown, uncovered and powdery. The chestnut-brown teliospores are unicellular, usually ovoid to ellipsoid, warty and mostly 18–21 × 15–17 µm in size. Their stem is colorless.
distribution
The known distribution area of Uromyces calopogonii is limited to Guatemala .
ecology
The host plant of Uromyces calopogonii is Calopogonium galactioides . 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 .