Allelopathic Effects of Alhagi mourorum L. on Germination Characteristics of Triticum aestivum L. and Carthamus tinctorius L.

The aim of this study was to investigate the allelopathic effect of aqueous and hydroalcoholic extracts of aerial parts of the Alhagi mourorum L. on germination,growth, soluble protein and sugar contents of Carthamus tinctorius L. and Triticum aestivum L. as factorial experiment was conducted in a completely randomized design with three replications. Treatments were concentrations (0, 0.25, 0.50, 0.75 and 1%) of aerial part extract. Results from Analysis of variance showed that the difference between extracts, concentrations and extract × concentration was significant (p < 0.05). The results showed that aqueous and hydroalcoholic extracts of aerial parts caused a significant decrease in germination percentage, plumule and root length, dry weights, soluble protein content and soluble sugar content in Carthamus tinctorius L. and Triticum aestivum L. But the hydroalcoholic extract had higher inhibitory effect on studied plants. The percentage of germination of hydroalcoholic extract in Triticum was 30% and in Carthamus was 33.66% had a more reduced effect than the aqueous extract.  Acording to the present results, it seems that Alhagi mourorum as a weed of wheat and safflower farms significantly (p < 0.05) reduce growth and quality of crop.