Puccinia interjecta
| Puccinia interjecta | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia interjecta | ||||||||||||
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Puccinia interjecta is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Baccharis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Central America .
features
Macroscopic features
Puccinia interjecta 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 Puccinia interjecta grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your spermogonia grow on both sides of the host leaves. The aecia of the species, growing on both or mainly underside of the leaves , protrude through slits and stand in small groups. They have 33–38 × 23–28 µm in size, usually ellipsoidal to broadly ellipsoidal and hyaline aeciospores with a spiky surface. The fungus does not develop uredia . The parts of the species growing underneath the leaves are black-brown, grouped and covered. The yellowish teliospores are two-celled, usually long ellipsoid and 62–78 × 23–27 µm in size. Their stem is colorless and up to 60 µm long.
distribution
The known distribution area of Puccinia interjecta extends from Guatemala to Mexico .
ecology
The host plants of Puccinia interjecta are various Baccharis species. 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 development cycle with spermogonia, aecia and telia, but does not change host.
Taxonomy
The species was first described in 1932 by Herbert Spencer Jackson .
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .