The study of Allelopathic potential in three species of Glaucium Mill. on Sinapis arvensis L. Mahlagha Ghorbanli1, Afsaneh Gran 1* and Amir Zolfaghary 2

Abstract

<span style="font-size: medium;"><span><span style="font-family: Calibri;">Charlock (<em>Sinapis arvensis</em> L.) is a serious </span><em><span>weed</span></em><span style="font-family: Calibri;"> of agriculture, especially in spring sown crops. </span></span><span style="font-family: Calibri;"><span><span> </span>Genus <em>Glaucium</em> Mill. belongs to Papaveraceae and members of this genus have several alkaloids in laticiferes. The present research focuses on effects of aquatic extract of <em>Glaucium oxylobum</em>, <em>G. elegans</em> and <em>G. grandiflorum</em> on many physiological factors of Charlock. Laboratory studies were conducted to determine the seed germination and growth factors in </span><span>charlock </span><span>as affected by water soluble constituents of three species of <em>Glaucium</em>. Aboveground tissues of these plants were collected during flowering stage and dried. Five concentrations of aqueous extracts were used: full- strength (33.3 g lit<span>-1</span>), three-fourth - strength (25 g lit<span>-1</span>), half- strength (16.7 g lit<span>-1</span>) and quarter- strength (8.3 g lit<span>-1</span>) and blank (0 g lit<span>-1</span>).</span><span> Charlock </span><span>seeds were placed in petri dishes containing the <em>Glaucium</em> extracts, or distilled water (control). Seed germination percent was calculated</span></span></span><span style="font-family: Calibri;"><span style="font-size: medium;"><span>after ten days. In general seed germination of Charlock declined progressively with increasing concentration of the <em>Glaucium</em> extracts. According to our results, with increasing concentration of aqueous extract, Charlock growth factors such as root and shoot length, root and shoot fresh and dry weight were </span><span>inhibited.</span></span></span>

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