Puccinia senecionicola
| Puccinia senecionicola | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia senecionicola | ||||||||||||
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Puccinia senecionicola is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family of the genera Cacalia and Senecio . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in much of Central America.
features
Macroscopic features
Puccinia senecionicola 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 senecionicola grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow on the upper side of the host leaves. The aecia of the species growing in groups on the underside of the leaves are white. They have 26–36 × 22–30 µm in size, mostly irregularly spherical to broadly ellipsoidal aeciospores with a warty surface. The uredia of the fungus growing on both sides or underside of the leaves are cinnamon brown. Their chestnut brown uredospores are 25–37 × 21–28 µm in size, ovate to broadly ellipsoidal and spiky. The parts of the species growing underneath the leaves are black-brown and covered, and some have paraphyses. The cinnamon to golden brown teliospores are one to two-celled, usually long ovoid to long ellipsoid and 43–66 × 22–28 µm in size. The stem is colorless to yellowish and up to 55 µm long.
distribution
The known distribution area of Puccinia senecionicola extends from El Salvador to southern Mexico . One site is also known from Hawaii.
ecology
The host plants of Puccinia senecionicola are various Cacalia and Senecio 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, Aecien, Telien and Uredien, but 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
- ↑ GBIF portal: Ocurrence Search. Retrieved on January 29, 2013 ( Memento of the original from November 27, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
