Secondary metabolites that could contribute to the monodominance of Erythrina fusca in the Brazilian Pantanal.

摘要: Erythrina fusca is a dominant species in the Brazilian Pantanal. We hypothesized that E. possess allelopathic potential and we evaluated effects of extracts on germination development Lactuca sativa, bioindicator species. tested effect leaves, bark, roots, seeds speed index, using high, moderate low concentration (0.2, 1 5 mg mL–1). To evaluate development, subjected seedlings L. sativa to same treatments measured root aerial part length. High reduced germination; leaves extract caused maximum reduction similar 2,4-Dichlorophenoxyacetic acid (2,4-D); this has flavonoids saponins as main compounds, classes also occur bark roots lower concentrations; (5 mg mL–1), (1 mg mL–1) decreased these traits well, but magnitude. A significant length was induced by highest all (5 mg mL–1); results suggest erythrinic alkaloids should interfere once accumulate almost exclusively class compounds. Our showed parts had adverse or showing different compounds secondary metabolites involved activity. Possibly, phytotoxicity influences monodominance Pantanal, studies are essential it other native