Allelopathic Influence
Allelopathic influence of Hieracium Pilosella on the germination and seedling development of Sinapis Alba
Background information: In the year 1937, a german botanist named Hans Molisch published a book named “The Influence of One Plant on Another: Allelopathy”, in which according to his description of allelopathy, it is the “result of biochemical reactions between plants”.
In the year 1984, professor Elroy Leon Rice defined allelopathy as following: “It is the mutual interaction of plants through a variety of chemical compounds secreted by living organisms or release during the decomposition of plant remains”
Referring to the above definition, it must be understood that nowadays, this term is understood as a definition for any direct or indirect, inhibitory or stimulating effect of
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Conclusion:
The above experiment shows us that the extract from H. Pilosella resulted in an inhibitory effect on the germination of S. Alba, and in the concentration of 5% completely halted the germination. In addition to that, if the plant had already germinated, the H. Pilosella extract halted its overall development as the length of the stem and root was significantly smaller with the increase in concentration.
If we compare the above observation with the earlier definition of allelopathy (“It is the mutual interaction of plants through a variety of chemical compounds secreted by living organisms or release during the decomposition of plant remains”), we can state that there are certain allelochemicals within the H. Pilosella extract, which cause an inhibitory effect on the S. Alba, and in this case we most certainly have an allelopathic case.
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