Uromyces martinii
| Uromyces martinii | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces martinii | ||||||||||||
| Farlow |
Uromyces martinii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the Korbblütlergattung Melanthera . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in Florida and Cuba .
features
Macroscopic features
Uromyces martinii 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 martinii grows as with all Uromyces TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow on the upper side of the surface of the host leaves. The aecia of the species growing underneath the leaves are small and stand in small groups. Their hyaline aeciospores are 19–23 × 16–19 µm in size, spherical to ellipsoidal and warty. The uredia of the mushroom growing on the underside of the leaves are light cinnamon brown. The light cinnamon to golden brown uredospores of the species are 20–24 × 20–22 µm in size, triangular, ovate to broadly ellipsoidal and spiky. The parts of the species growing underneath the leaves are chocolate brown, powdery and uncovered. The chestnut-brown teliospores are unicellular, usually broadly ovate to broadly ellipsoidal, wrinkled and mostly 29–33 × 22–26 µm in size. Their stem is usually colorless and up to 50 µm long.
distribution
The known distribution area of Uromyces martinii includes southern Florida , but also Cuba .
ecology
The host plants of Uromyces martinii are Melanthera hastata and M. parvifolia . 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 macrocyclical development cycle with Spermogonia, Aecien, Telien and Uredien. As an auto-ecologic parasite, it does not 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 .
Individual evidence
- ^ Schmiedeknecht, M. (1983, publ. 1984). Uredinales from Cuba. Feddes Repertorium Specierum Novarum Regni Vegetabilis 94 (9-10): 683-708.