Uromyces fabae
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| Uromyces fabae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Uromyces fabae | ||||||||||||
| Bary ex Cooke |
Uromyces fabae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of peas and vetch . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is spread all over the world.
features
Macroscopic features
Uromyces fabae 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 fabae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The spermogonia of the species growing on the upper side of the host leaves are covered and small, they have paraphyses. Your sperm are 1.2–4 µm in size. The aecia grow in circular groups. The aeciospores are usually polyhedral, spherical to ellipsoidal, orange, warty and 14–21 × 14–21 µm in size. The uredia of the fungus, usually growing on the underside of the leaf and on stems and stems, are light brown and bursting. Their light brown uredospores are broadly ellipsoidal to broadly ovate, 21–33 × 19–25 µm in size and spiky. The parts of the species growing on the host leaves are dark brown and powdery. The brown teliospores are two-celled, usually ovate to almost spherical, smooth and 25–40 × 18–28 µm in size. Their stalk is yellowish and usually longer than the spores.
distribution
The known distribution area of Uromyces fabae includes the entire world.
ecology
The host plants of Uromyces fabae are various peas ( Pisum spp.) And vetch ( Vicia spp.). 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 has a development cycle with Aecien, Spermogonia, Telien and Uredien and does not change host.
literature
- Ernst Gäumann: The rust fungi of Central Europe. With special consideration of Switzerland . In: Contributions to the cryptogam flora in Switzerland . tape 12 . Commission publisher Buchdruckerei Büchler & Co, Bern 1959.