Cytogenetic Effects of Herbicides Gesagard and lgran in Barley.

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In this study, cytogenetic effects of gesagard and igran, which are isomers of each other among herbicides of triazine group, in barley have been studied comparatively. The fact that barley seeds have been treated with 10-2 (1%) g/100cm3 aqueous solution of herbicides, gesa-gard and igran for 12 and 24 hr, has caused to decrease significantly the mitotic index (MI) of root tip cells.<br>By the treatment of barley with gesagard for 12 hr, C-metaphase has been obtained. In this group, 63.33% C-metaphase has been observed. On the other hand, C-metaphase has been observed in a small amount in the other groups, in which barley has been treated with gesagard and igran for 24 hr. Besides, gesagard has caused chromosome contraction.

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