Puccinia enixa
| Puccinia enixa | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia enixa | ||||||||||||
| Cummins |
Puccinia enixa is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Baccharis braunii . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in Costa Rica and Panama .
features
Macroscopic features
Puccinia enixa 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 enixa grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow in small groups on the upper side of the host leaves. The aecia of the species growing on both sides or mainly underneath the leaves are yellowish. They have 35–48 × 22–32 µm large, long to broad ellipsoidal aeciospores with a wrinkled surface. The yellowish uredia grow on the underside of the leaf. Their colorless uredospores are 33–42 × 18–24 µm in size, ovate to ellipsoid and spiky. The parts of the species growing underneath the leaves are yellowish, compact and uncovered. The colorless teliospores are two-celled, usually ovate to oblong and 50–68 × 22–27 µm in size. Their stem is colorless and up to 82 µm long.
distribution
The known distribution area of Puccinia enixa includes Costa Rica . New finds come from Panama on Baccharis cf. pedunculata .
ecology
The host plant of Puccinia enixa is Baccharis braunii . 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.
literature
- George Baker Cummins : The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .
Individual evidence
- ↑ O. Perdomo-Sánchez & M. Piepenbring (2008) A new species of Puccinia (Pucciniales, Basidiomycota) and new records of rust fungi from Panama. Mycol Progress 7: 161-168. doi : 10.1007 / s11557-008-0561-5