Effects of tannins on spore germination and growth of Fusarium solani f. phaseoli and Verticillium albo-atrum
| Autor: | G. C. Papavizas, J. A. Lewis |
|---|---|
| Rok vydání: | 1967 |
| Předmět: |
Fusarium solani f. phaseoli
chemistry.chemical_classification Spores biology fungi Immunology General Medicine biology.organism_classification Verticillium Applied Microbiology and Biotechnology Microbiology Wattle (anatomy) chemistry Fusarium Botany Genetics Spore germination Gallotannin Mitosporic Fungi Molecular Biology Fusarium solani Tannins Mycelium |
| Zdroj: | Canadian journal of microbiology. 13(12) |
| ISSN: | 0008-4166 |
| Popis: | Gallotannin, wattle, canaigre, and chestnut tannins in a complete medium affected in vitro spore germination and mycelial growth of Fusarium solani f. phaseoli and Verticillium albo-atrum. The pH values and tannin concentration were important factors determining the effectiveness of tannins as inhibitors. Under acidic conditions (pH 5), gallotannin, canaigre, and chestnut tannins at concentrations varying from 39 p.p.m. to 625 p.p.m. inhibited spore germination of both fungi. At a concentration of 1000 p.p.m. these tannins completely prevented growth at pH 5 of both fungi during a 20-day period. Under near neutral conditions (pH 6–7) there was a minimum inhibition of spore germination and mycelial growth with all tannins tested. Under alkaline conditions (pH 8) there was some degree of inhibition of spore germination, but, in general, growth was similar to that under neutral conditions. Wattle tannin was unusual in that it did not prevent growth of either fungus under acidic conditions although the growth of V. albo-atrum was appreciably reduced compared with the control. Gallotannin, however, prevented growth of both fungi under alkaline as well as acidic conditions. |
| Databáze: | OpenAIRE |
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