Allelopathic effects of leachates of Juglans regia L., Populus tremula L. and juglone on germination of temperate zone cultivated medicinal and aromatic plants

Abstract The environmental benefits of agroforestry systems are well known. However, current knowledge potential allelopathic interactions is inadequate. decrease in soil fertility, the increasingly rhapsodic distribution precipitation, and special metabolism cultivation medicinal aromatic plants all harbingers medicinal-agroforestry systems. authors aimed to discover effects Juglans regia L. Populus tremula on germination cultivated a temperate zone. Accordingly, an vitro trial was conducted with leachates these trees two juglone concentrations. These were evaluated for vigour, rate, total fresh weight seedlings twelve different species. A pronounced species specificity observed tolerance seeds effect . In four studied, may inhibit germination, but only initially. Poppy angelica proved be most sensitive treatments. following had relative allelochemicals, so further research under natural conditions suggested for: Althea officinalis (9.34 ± 5.04–68.66 13.62 GR%), Anethum graveolens (12.00 2.00–100.00 6.12 Cannabis sativa (72.66 9.02–91.34 1.16 Dracocephalum moldavica (38.00 2.00–80.00 17.44 Linum usitatissimum (44.66 2.00–58.00 3.46 Satureja hortensis (52.00 28.22–82.00 8.00 GR%). aim would introduce them into