RT journal article T1 Phytotoxicity of alkaloids, coumarins and flavonoids isolated from 11 species belonging to the Rutaceae and Meliaceae families A1 Nebo, Liliane A1 González Molinillo, José María A1 Sampaio, Olívia M. A1 G.P. Severino, Vanessa A1 M. Cazal, Cristiane A1 das Graças Fernandes, Maria Fátima A1 B. Fernandes, João A1 Varela Montoya, Mercedes A1 González Molinillo, José María A1 Macías Domínguez, Francisco Antonio A2 Química Orgánica K1 Allelopathy K1 phytotoxicity K1 Meliaceae K1 Rutaceae K1 Alkaloids K1 Coumarins K1 Flavonoids AB Meliaceae and Rutaceae families are known for the high diversity of their secondary metabolites, which include many groups that represent a rich source of structural diversity, and are good candidates as sources of allelochemicals that could be useful in agriculture. In the work described here the bioactivity profiles were evaluated for 3 alkaloids (1–3), 12 coumarins (4–15), 2 phenylpropanoic acid derivatives (16 and 17) and 14 flavonoids (18–31) from 11 species belonging to the Meliaceae and Rutaceae families. All compounds were tested in the wheat coleoptile bioassay and those that showed the highest activities were tested on the STS (Standard Target Species) Lepidium sativum (cress), Lactuca sativa (lettuce), Lycopersicon esculentum (tomato), and Allium cepa (onion). Most of the isolated compounds showed phytotoxic activity and graveoline (3), psoralen (8), and flavone (18) were the most active, with bioactivity levels similar to that of the commercial herbicide Logran1. The results indicate that these compounds could be involved as semiochemicals in the allelopathic interactions of these plant species. PB Phytochemistry Letters YR 2014 FD 2014-03 LK http://hdl.handle.net/10498/20312 UL http://hdl.handle.net/10498/20312 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 12-nov-2026