Effect of seasonal variation in Sálvia allelopathy potential

Clair Aparecida Viecelli, Claudia Tatiana Araujo da Cruz-Silva

Abstract


The biosynthesis and the accumulation of the chemical composites that have allelopathy characteristics in Salvia officinalis L. (Lamiaceae) are resulting from the secondary plant metabolism. The present work had as objective to analyze the allelopathic effects of aqueous extracts of fresh leaves of Sálvia collected during the seasons, obtained by decoction, static infusion and grinding, on the germination and development of seedlings of lettuce (Lactuca sativa L.). The experiment had 20 treatments (concentrations 0; 7.5; 15; 22.5 and 30%). The results had been submitted to the Tukey test, to the level at 5% probability. The appraised variables, germination percentage, the germination speed index (GSI), the growth of shoot and roots and abnormality formation of seedlings did not present a pattern of allelopathy in the different seasons, indicating a possible alteration in the plant metabolism in function of the seasonal variation in the plant ambient.


Keywords


Salvia officinalis L; Lactuca sativa L; Aqueous extracts.



DOI: http://dx.doi.org/10.5433/1679-0359.2009v30n1p39

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional