Allelopathic activity of Nerium Oleander L. and Dieffenbachia picta schott in seeds of Lactuca sativa L. and Bidens pilosa L.

Authors

  • Clairomar Emílio Flores Hoffmann
  • Luiz Augusto Salles das Neves
  • Cristiane Freitas Bastos
  • Gabriel da Luz Wallau

Keywords:

allelopathy, aqueous extracts, germination, IVG, biomass.

Abstract

Aqueous extracts from green leaves of Nerium oleander L. and Dieffenbachia picta in concentrations of 0; 0,0625; 0,125 and 0,25 mg/mL were prepared with the objective of studying the allelopathic potential of these ornamental plant species on lettuce (test plant) and Bidens pilosa L seeds. The experiments were carried out in January of 2007, at the Genetic Laboratory of Santa Maria Federal University. The first count of germination (PCG), germination (G), germination speed index (IVG), root and shoot length, and fresh biomass (MF) were evaluated. Both species showed tendency to reduce the analyzed morphological variables from the concentration of 0,125 mg/mL. The seeds of Bidens pilosa L. were more sensible to aqueous extracts than lettuce seeds. The IVG showed the greatest reduction with the increase of extracts concentration. The MF of lettuce and Bidens pilosa L. plants were reduced from the concentration of 0,0625 mg/mL. Both extracts showed potential allelopathic activity.

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How to Cite

HOFFMANN, Clairomar Emílio Flores; NEVES, Luiz Augusto Salles das; BASTOS, Cristiane Freitas; WALLAU, Gabriel da Luz. Allelopathic activity of Nerium Oleander L. and Dieffenbachia picta schott in seeds of Lactuca sativa L. and Bidens pilosa L. Revista de Ciências Agroveterinárias, Lages, v. 6, n. 1, p. 11–21, 2007. Disponível em: https://revistas.udesc.br/index.php/agroveterinaria/article/view/5353. Acesso em: 17 jun. 2024.

Issue

Section

Research Article - Science of Plants and Derived Products