Le Paraquat, un Outil pour la Révélation Rapide d'Infections Fongiques Latentes et de Champignons Endophytes
| Autor: | R. Pezet, D. Gindrat |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Fusarium
food.ingredient biology Physiology fungi Winter wheat food and beverages Plant Science biology.organism_classification Plant use of endophytic fungi in defense Yeast chemistry.chemical_compound food Paraquat chemistry Botany Genetics Agar Agronomy and Crop Science Nutrient agar Botrytis cinerea |
| Zdroj: | Journal of Phytopathology. 141:86-98 |
| ISSN: | 1439-0434 0931-1785 |
| DOI: | 10.1111/j.1439-0434.1994.tb01448.x |
| Popis: | Paraquat: a tool for the quick development of latent fungal infections and endophytic fungi. Detached winter wheat leaves without any symptom of fungal infection were thoroughly washed, surface desinfected, treated with paraquat (0.03–0.32% a.i.) and incubated on nutrient agar or in moist chambers under sterile conditions. Microscopic examinations showed that hypae and yeast cells emerged from several stomata within 48–72 h after treatment. Fungal colonies developed on agar within the same period of time. More than 27 filamentous fungal genera and yeasts were identified during a wheat cropin healthy, green leaves. Non-treated leaves showed very few early emergences of fungi from stomata, but senescent leaves eventually yielded several fungal taxa observed after paraquat treatment. Similar observations were made on non-detached wheat leaves, and on detached sugarbeet leaves. Paraquat also induced development of Fusarium spp. from detached healthy winter wheat ears before or after heading. In grape berries, paraquat induced the development of latent infections of Botrytis cinerea, a few days after treatment. The usefulness of paraquat for the detection of endophytes and for the diagnosis of early and latent fungal infections in plants, and the possible involvement of endophytes in tissue senescence are discussed. |
| Databáze: | OpenAIRE |
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