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Tricolorin A as a Natural Herbicide
Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México, México D.F., C.P. 04510, Mexico
Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, México D.F., C.P. 04510, Mexico
* Author to whom correspondence should be addressed.
Received: 15 November 2012; in revised form: 3 January 2013 / Accepted: 5 January 2013 / Published: 9 January 2013
Abstract: Tricolorin A acts as pre- and post-emergence plant growth inhibitor. In pre-emergence it displays broad-spectrum weed control, inhibiting germination of both monocotyledonous (Lolium mutliflorum and Triticum vulgare) and dicotyledonous (Physalis ixocarpa and Trifolium alexandrinum) seeds, being the dicotyledonous seeds the most inhibited. Tricolorin A also inhibited seedling growth, and seed respiration, and since the concentrations required for inhibiting both germination and respiration were similar, we suggest that respiration is one of its targets. Tricolorin A at 60 µM acts as a post- emergence plant growth inhibitor by reducing dry plant biomass by 62%, 37%, 33%, and 22% for L. multiflorum, T. alexandrinum, T. vulgare, and P. ixocarpa, respectively, 18 days after its application. In order to determine the potency of tricolorin A as a plant growth inhibitor, paraquat was used as control; the results indicate that tricolorin A acts as a non-selective post-emergence plant growth inhibitor similar to paraquat, since both reduced the biomass production in P. ixocarpa and T. alexandrinum. Therefore, we suggest that tricolorin A will be a good biodegradable herbicide for weeds.
Keywords: germination; Lolium mutliflorum; Physalis ixocarpa; pre-emergence herbicide; post-emergence-herbicide; photosynthesis; seed respiration; Trifolium alexandrinum; Triticum vulgare
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Lotina-Hennsen, B.; King-Díaz, B.; Pereda-Miranda, R. Tricolorin A as a Natural Herbicide. Molecules 2013, 18, 778-788.
Lotina-Hennsen B, King-Díaz B, Pereda-Miranda R. Tricolorin A as a Natural Herbicide. Molecules. 2013; 18(1):778-788.
Lotina-Hennsen, Blas; King-Díaz, Beatriz; Pereda-Miranda, Rogelio. 2013. "Tricolorin A as a Natural Herbicide." Molecules 18, no. 1: 778-788.