Puccinia minussensis
| Puccinia minussensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia minussensis | ||||||||||||
| Towers |
Puccinia minus sensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the daisy family genus Lactuca . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It iswidespread in the Holarctic .
features
Macroscopic features
Puccinia minussensis can only be recognized by the naked eye from 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 minus sensis 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 the underside of the leaf and on the stems emerge through a small pore. They have 21–22 × 17–22 µm in size, approximately spherical to ellipsoidal aeciospores with a warty surface. The uredia growing on both sides of the mushroom are cinnamon brown. Their cinnamon or golden brown uredospores are 23–26 × 20–25 µm in size, spherical to broadly ellipsoidal and spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered. The chestnut-brown teliospores are one to two-celled, usually ellipsoidal, wrinkled and 30–38 × 19–25 µm in size. Their stem is colorless.
distribution
The well-known distribution area of Puccinia minussensis extends from the eastern USA via Canada and Asia to Europe .
ecology
The host plants of Puccinia minussensis are Lactuca sibirica , Lactuca pulchella and Lactuca canadensis and other species of the genus Lactuca . Species of the genus Cicerbita and Ligularia are also known hosts. The fungus also 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 .