Ünal, MeralPalavan Ünsal, NarçinTüfekçi, M. A.2016-04-262016-04-262008-030236-5383http://hdl.handle.net/11413/1209The genotoxic and cytotoxic effects of exogenous polyamines (PAs), putrescine ( Put), spermidine (Spd), spermine (Spm) and PA biosynthetic inhibitors, alpha-difluoromethylornithine ( DFMO), cyclohexilamine (CHA), methylglioxal bis-(guanylhydrazone) ( MGBG) were investigated in the root meristems of Allium cepa L. The reduction of mitotic index and the induction of chromosomal aberrations such as bridges, stickiness, c-mitotic anaphases, micronuclei, endoredupliction by PAs and PA biosynthetic inhibitors were observed and these were used as evidence of genotoxicity and cytotoxicity.en-USallium cepachromosome aberrationmitotic activitypolyaminepolyamine biosynthetic inhibitorcell-cyclespermidinegrowthseedlingsplantskromozom aberasyonmitotik aktivitepoliaminpoliamin biyosentetik inhibitörühücre döngüsübüyümefidanbitkilerArticle2532566000082532566000082-s2.0-400490930592-s2.0-40049093059