1. Synergistic effect of Cordia curassavica Jacq. essential oils association against the phytopathogen Xanthomonas campestris pv. campestris.
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Da Silva, Rafael Salomão, De Oliveira, Mayara Mendes Gonçalves, Silva, Kleiton Paulo, Da Silva Vasconcelos Rodrigues, Isabela, Dos Santos Pinto, Vanderson, Blank, Arie Fitzgerald, and Fernandes, Roberta Pereira Miranda
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XANTHOMONAS campestris ,ESSENTIAL oils ,FUNGICIDES ,BACTERICIDES ,ANALYTICAL chemistry ,NATURAL products - Abstract
The increased use of pesticides applied to treat diseases caused by bacteria has caused serious environmental problems. There are few fungicides/bactericides for the treatment of plant diseases caused by Xanthomonas campestris pv. campestris (Xcc), and only two natural products with general bactericidal/fungicidal use are available on the market. Thus, this study evaluated the antimicrobial activity of essential oils (EOs), and their combinations, from five distinct genotypes of Cordia curassavica (Jacq.) Roem. & Schult (Syn. Varronia curassavica Jacq.) (CCUR) against Xcc. GC/MS chemical analysis revealed α-pinene, sabinene, (E)-caryophyllene, ar-curcumene, β-sesquiphellandrene, 7-cyclodecen-1-one, and ar-Turmerone as the major compounds of the five EOs of CCUR. All EOs showed growth inhibition of Xcc with minimum inhibitory concentration between 500 and 1000 μg mL
−1 . The associations between two EOs from different CCUR genotypes showed that 70% of the total combinations had an additive effect. However, the combinations between CCUR-002 × (-302, -202) and CCUR-302 × (-601) showed a synergistic effect, with mean fractional inhibitory concentration FIC50 values of 0.28, 0.42, and 0.40, respectively. This study demonstrates that combinations of C. curassavica EOs have antimicrobial activity and a potential to be used in the control of black rot. [ABSTRACT FROM AUTHOR]- Published
- 2020
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