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The Joint Action of Sesquiterpene Lactones from Leaves as an Explanation for the Activity of Cynara cardunculus

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URI: http://hdl.handle.net/10498/20351

DOI: 10.1021/acs.jafc.6b02678

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2016-The Joint Action of Sesquiterpene Lactones from Leaves as an Explanation for the Activity of Cynara cardunculus.pdf (1.245Mb)
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Author/s
F. García, Benito; Rial Cumbrera, CarlosAuthority UCA; Varela Montoya, Rosa MaríaAuthority UCA; Torres Martínez, AscensiónAuthority UCA; González Molinillo, José MaríaAuthority UCA; Macías Domínguez, Francisco AntonioAuthority UCA
Date
2016-08
Department
Química Orgánica
Source
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016, 64, 6416−6424
Abstract
The work described herein is a continuation of a previous study centered on the bioprospect of cardoon (Cynara cardunculus) leaf extracts through the isolation of secondary metabolites with phytotoxic activity. Chromatographic fractionations of the ethyl acetate extract and spectroscopic analysis showed that the majority of the components were sesquiterpene lactones. Of these compounds, aguerin B, grosheimin, and cynaropicrin were very active on etiolated wheat coleoptile, standard target species, and weed growth. The joint action of binary mixtures of these three active sesquiterpene lactones and one nonactive compound (11,13-dihydroxy-8-desoxygrosheimin) was studied. The activities of fixed-ratio mixtures were assessed on wheat coleoptile. The results can be interpreted with respect to a reference model by considering dose−response analyses and isobolograms with linear regression analyses. A total of 17 binary mixtures at different levels of inhibition (ED25, ED50, and ED75) were studied, and predominantly they responded additively (25). Deviations from additivity included seven synergistic responses and two antagonistic responses. The joint action of major sesquiterpene lactones isolated from C. cardunculus can explain the activities observed in extracts and fractions. The results reported here reiterate the utility of the wheat coleoptile bioassay as a quick tool to detect potential synergistic effects in binary mixtures.
Subjects
sesquiterpene lactones; cytotoxicity bioassays; binary mixtures; isobole; additive; synergism; antagonist
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  • Artículos Científicos [5002]
  • Artículos Científicos INBIO [269]
  • Articulos Científicos Quim. Org. [181]
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
This work is under a Creative Commons License Attribution-NonCommercial-NoDerivatives 4.0 Internacional

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