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Molecules 2016, 21(11), 1501; doi:10.3390/molecules21111501

Resveratrol and Coumarin: Novel Agricultural Antibacterial Agent against Ralstonia solanacearum In Vitro and In Vivo

Laboratory of Natural Product Pesticide, College of Plant Protection, Southwest University, Chongqing 400715, China
Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 13 October 2016 / Revised: 28 October 2016 / Accepted: 4 November 2016 / Published: 9 November 2016
(This article belongs to the Section Natural Products)
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Bacterial wilt is a destructive disease caused by the phytopathogen Ralstonia solanacearum (R. solanacearum), which is widely found in various tobacco-growing areas all over the world. Botanical bactericidal substances have gradually emerged as a hot topic in modern pesticide research. In this study, the antibacterial activities of two phytochemicals (resveratrol and coumarin) against R. solanacearum and their in vivo and in vitro efficacy for controlling tobacco bacterial wilt were evaluated. We rule out significant biological effects of both phytochemicals using transmission electron microscope (TEM) and fluorescence microscope, which suppressed the growth of R. solanacearum. Furthermore, we demonstrated that the toxicity mechanisms mainly involved damaging bacterial cell membrane and preventing swarming motility and biofilm formation. A further pot experiment demonstrated that coumarin and resveratrol significantly inhibited early adhesion and colonization of R. solanacearum in tobacco plants and the corresponding control efficacies were 68% and 85% after incubation for 13 days, respectively. The findings of this study suggest that both resveratrol and coumarin have potential as non-toxic antimicrobial strategies for controlling tobacco bacterial wilt disease. View Full-Text
Keywords: resveratrol; Coumarin; R. solanacearum; antibacterial activity; bacterial wilt resveratrol; Coumarin; R. solanacearum; antibacterial activity; bacterial wilt

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chen, J.; Yu, Y.; Li, S.; Ding, W. Resveratrol and Coumarin: Novel Agricultural Antibacterial Agent against Ralstonia solanacearum In Vitro and In Vivo. Molecules 2016, 21, 1501.

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