Resumo

BONFIM, F.P.G. et al. Allelopathic effect of extracts of Melissa officinallis L. and Mentha x villosa L. on seed germination and vigor of Plantago major L.. Rev. bras. plantas med. [online]. 2011, vol.13, n.spe, pp. 564-568. ISSN 1516-0572.  http://dx.doi.org/10.1590/S1516-05722011000500010.

The aim of this work was to evaluate the effect of aqueous extracts of Melissa officinallis and Mentha x villosa for the germination and vigor of Plantago major seeds. The experiment was conducted at the Plant Science Department, Federal University of Viçosa, in April 2011. The design was a completely randomized design with five treatments (control, 25%, 50%, 75% and 100% of the aqueous extract of Mentha x villosa and Melissa Officinallis) and four replications. The extracts were prepared utulizando the shoots of plants at the rate of 100g of plant to 1 L of distilled water. We used 50 Plantago major seeds in each box incubator and these were subsequently placed in a germination chamber. 14 days during the counting of germinated seeds per day to calculate the index of germination speed and the end of 14 days was the germination percentage. Plantago major seeds not subjected to aqueous extracts of lemon balm and mint showed higher values in the variables studied when compared to other concentrations, showing the allelopathic potencial of Melissa officinallis and Mentha x villosa on the development of plantain, determined by germinating.

Palavras-chave : plantain; mint; lemon balm; allelopathy.