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Molecules 2013, 18(1), 778-788; doi:10.3390/molecules18010778
Article

Tricolorin A as a Natural Herbicide

1,* , 1
 and
2
Received: 15 November 2012 / Revised: 3 January 2013 / Accepted: 5 January 2013 / Published: 9 January 2013
(This article belongs to the Section Metabolites)
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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 germination; Lolium mutliflorum; Physalis ixocarpa; pre-emergence herbicide; post-emergence-herbicide; photosynthesis; seed respiration; Trifolium alexandrinum; Triticum vulgare
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.

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Lotina-Hennsen, B.; King-Díaz, B.; Pereda-Miranda, R. Tricolorin A as a Natural Herbicide. Molecules 2013, 18, 778-788.

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