Germination responses on phenols content of pine forest clear cuttings dominants

The object of this study was to evaluate allelopathic impact of dominant species (Calamagrostis epigeios, Rubus idaeus and Chamaerion angustifolium) of clear-cuttings of pine forests (Vaccinio - myrtillo Pinetum) on germination. Aqueous extracts of roots and shoots were produced and assayed at different growth stages. Additionally total concentration of phenols was evaluated photo spectrometrically. Shoot extracts stronger inhibited germination than those of roots of all tested plant species. The strongest suppressive effect on germination and the highest phenols content was estimated at species flowering stage as compared with growth stages in spring and autumn. In accordance with mean germination data the strongest phytoactivity exhibited R. idaeus than C. epigeios and Ch. angustifolium. Nonetheless this study implied in species allelopathic activity as a potential suppressive factor which could influence germination and forest regeneration, however studies in situ are necessaryVytauto Didžiojo universitetasŽemės ūkio akademij