The influence of trifluralin on the ultrastructure of root meristem cells in wheat triticum aestivum l. and sunflower helianthus annuus l
Sparchez, C.; Soran, V.; Craciun, C.; Polizu, A.; Craciun, V.
Revue Roumaine de Biologie Serie de Biologie Vegetale 32(1): 39-42
The herbicide Triflurom 24 EC (24% trifluralin .alpha.,.alpha.,.alpha.-trifluoro-2,6-dinitro-N,N-dipropyl-toluidin), applied continually for 5 days to germinating wheat and sunflower seeds brought about important ultrastructural modification in the meristematic cells of primary roots. The modifications depended on species. In wheat, trifluralin influenced mostly the structure of the nuclear apparatus. As trifluralin inhibited the formation of new cellular walls after division, the cells became gigantic and polynucleate. The nuclei were smaller in size and some of them probably lacked nucleolus. In sunflower, trifluralin modified the lipid metabolism and induced a decrease in the amount of nucleus heterochromatin.