دورية
Efficacy of antifungal substances of three Streptomycesspp. against different plant pathogenic fungi
| العنوان: | Efficacy of antifungal substances of three Streptomycesspp. against different plant pathogenic fungi |
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| المؤلفون: | Ghanem, Gamal A. M., Gebily, Doha A. S., Ragab, Mona M., Ali, Ayat M., Soliman, Nour El-Deen K., El-Moity, Tawfik H. Abd |
| المصدر: | Egyptian Journal of Biological Pest Control; December 2022, Vol. 32 Issue: 1 |
| مستخلص: | Background: Soil-borne plant pathogenic fungi with a wide host range of crops cause a significant limitation on the global production of agronomic crops. Applications of synthetic pesticides are an important tool for managing plant diseases, but have deleterious influences on the environment as well as its incompatibility with organic agriculture. Recently, Streptomycesspp. became one of the best bio-control agents as a promising environmentally eco-friendly method for effective management of plant diseases. Results: In a previous research, three species of Streptomycesspp., i.e.,S. griseus(MT210913 “DG5”), S. rochei(MN700192 “DG4”) and S. sampsonii(MN700191 “DG1” strains) were identified, as exhibiting potent antifungal activities against plant pathogenic fungus, Sclerotinia sclerotiorum in vitro and greenhouse. GC–Mass analysis revealed the presence of 44, 47 and 54 substances of S. sampsoniiDG1, S. griseusDG5 and S. rocheiDG4, respectively. GC–MS revealed substances, with bio-control activity, were categorized as volatile organic compounds (VOCs), fatty acids and plant growth regulators, etc. GC–MS analysis exhibited the presence of 7, 13 and 20 volatile compounds produced by S. sampsonii, S. rocheiand S. griseus,respectively. These substances exhibited potent antifungal activity against various plant pathogenic fungi, i.e., Botrytis cinerea, Macrophomina phaseolina, Rhizoctonia solaniand S. sclerotiorum in vitro, by dual-culture assay. The three strains inhibited all the pathogenic fungi in dual-culture assay in the range of 30–73.67%. Also, the produced substances were applied in vivo (in the field) and supported their potential biocontrol agent against S. sclerotiorumas well as possessed significant biological properties for plant health and growth. Applying Streptomycesspp. culture broth in the field enhanced physiological responses of phenols, sugar, chlorophyll, protein contents and parameters as well as the yield of bean plants. Conclusion: In field experiments, foliar application of Streptomycesspp. and their metabolites proved to be a great potential, as promising biocontrol agents, for controlling S. sclerotiorumand enhanced plant growth and yield. S. rocheiand S. griseusproved to be strong antifungal, plant growth promoters and environmentally eco-friendly fungicides. |
| قاعدة البيانات: | Supplemental Index |
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Full Text Finder | تدمد: | 11101768 25369342 |
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| DOI: | 10.1186/s41938-022-00612-9 |