Antifungal activity of plant extracts against Colletotrichum lagenarium, the causal agent of anthracnose in cucumber |
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Authors: | Chen Yijuan Dai Guanghui |
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Affiliation: | Plant Health and Natural Products Laboratory, Key Laboratory of Urban Agriculture-South, Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China. |
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Abstract: | BACKGROUND: Colletotrichum lagenarium is an important plant‐pathogenic fungus that causes anthracnose of cucumber, a disease that is widespread under both greenhouse and field cultivation. To find a promising method for the control of this disease, extracts of eight plants from China were screened in the study presented here. RESULTS: The results showed that the extract of Cinnamomum camphora (L.) Presl had significantly greater inhibitory activity against C. lagenarium than the other seven plant extracts tested in vitro. At 5 days after inoculation in a potted seedling experiment, C. camphora extract demonstrated 95% control of C. lagenarium at a concentration of 16 mg mL?1, and the MIC50 was 2.596 mg mL?1. Microscopic observation showed that this extract had a significant impact on the morphology of the fungus, leading to shorter hyphae that were more branched; this observation was associated with the inhibition of mycelial growth. Stability assays revealed that the extract was relatively stable at 80 °C, under acidic conditions and when exposed to light and short periods of UV radiation. CONCLUSION: These results demonstrated that the extract from C. camphora could be used as a potent phytochemical fungicide. Copyright © 2012 Society of Chemical Industry |
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Keywords: | plant extract antifungal activity Colletotrichum lagenarium Cinnamomum camphora (L.) Presl. |
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