Allelopathy of Parthenium hysterophorus L. On Lettuce, Wheat and Selected Pathogens

In allelopathy, plants can release different types of chemicals, which may affect other plants directly or indirectly, resulting in the inhibition of seed germination or plant growth.Parthenium hysterophorus L. is one of the most hazardous weeds that can broadly affect cultivated crops as well as wild types of plant species through allelochemicals.In this study, the allelopathic effect of P. hysterophorus on lettuce, wheat and some pathogens were explored.Various extracts of P. hysterophorus were obtained and then applied in different concentrations.Phytochemical analysis of different compounds was done using various qualitative and quantitative tests.After exposure of lettuce and wheat plants to seed extracts and root exudates of P. hysterophorus, the growth and length of leaf, stem and roots of the receiver plants were significantly affected.Moreover, P. hysterophorus exudates caused shrinkage with the thickness of the leaf, stem and root cells.The exudates of P. hysterophorus were also tested for their potential anti-microbial activities against Escherichia coli, Klebsiella pneumoniae, Morganella morganii, Clavibacter michiganensis, Pseudomonas aeruginosa and Staphylococcus aureus, but there were no zones of inhibition detected.According to the current study, the exudates of P. hysterophorus might contain potent allelochemicals, which can be used against weeds to achieve sustainable agriculture.

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