Infection of barley by Ramularia collo-cygni: scanning electron microscopic investigations
| Autor: | Herbert Huss, Tobias Minihofer, Edith Stabentheiner |
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| Rok vydání: | 2008 |
| Předmět: |
Ramularia
biology Spots Hypha Veterinary (miscellaneous) fungi food and beverages Hordeum biology.organism_classification Applied Microbiology and Biotechnology Microbiology Zea mays Conidium Plant Leaves Ascomycota Germination Botany Spore germination Microscopy Electron Scanning Hordeum vulgare Seasons Agronomy and Crop Science Conidium formation Plant Diseases |
| Zdroj: | Mycopathologia. 168(3) |
| ISSN: | 1573-0832 |
| Popis: | Ramularia collo-cygni causes leaf spots on barley (Hordeum vulgare), a disease of growing economical importance. Scanning electron microscopy was used to study the life cycle of the fungus on barley during the vegetation period and in winter. The infectious stage started with conidium germination on the surface and the penetration into the leaf via the stomatal pore where the hyphae grew within the cells that became necrotic. The conidiophores emerged through the stomatal pore. On older leaves, however, they frequently emerged apart from it and the results suggested a pushing apart of adjacent cell walls of the epidermal cells. An assessment of the amount of conidium formation of one heavily infested barley plant resulted in 4.05 x 10(6) conidia per plant. For the first time, conidiophores, conidium production and germination of conidia were also observed in winter on barley and on maize leaves. |
| Databáze: | OpenAIRE |
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