Abstract
Allelopathy determines the dynamics of germination, development and growth of plant species in the environment. Therefore, in this study, the allelopathic effect of an aqueous extract isolated from walnut (Juglans regia L.) leaves (concentrated extract, 1:2, 1:4 and 1:8) on the germination percentage, mean germination value and germination rate of wheat (Triticum aestivum L.) and peas was monitored (Pisum sativum L.). Both tested species were sensitive to juglone, but the percentage of germination was significantly lower in wheat (by 80%) compared to peas, so it can be said that this species is more sensitive. The length of roots and shoots of both tested species decreased in proportion to the increase in the concentration of the extract. Monitoring of this biological phenomenon could help to understand the changes in the environment caused by allelochemicals.
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