%0 Journal Article
%T Effects of Zn2+ on root growth,cell division, and nucleoli of Allium cepa L.
%A Liu Donghu
%A Jiang Wusheng
%A Wang Chunli
%A Zhai Lin
%J 环境科学学报(英文版)
%D 1996
%I 
%X The effects of different concentrations of Zn2+ion on root growth,cell division,and nucleoli of Allium cepa were studied. The test Zn2+ ion concentration was made up from zinc sulphate (ZnSO4. 7H2O) ranging from 10-7 to 10-2 mol/L. The solutions were prepared in tap water (pH =6. 5).The results indicated that Zn2+ could obviously inhibit root growth at concentrations from 10-4)to 10-2 mol/L.Roots treated with zinc sulphate showed the presence of c-mitosis, anaphase bridges,including sticky and fluidized bridges (at 10-3 to 10-2 mol/L) , chromosome stickiness, irregularly shaped nuclei, broken nuclei and micronuclei. A toxicity effect was also observed on the nucleoli using silver staining technique after 48h of treatment with 10-4to 10-2 mol/L Zn2+, e. g,the nucleolar particulate material scattered around the nucleoli in the nucleus of root tip cells.
%K Allium
%K mitosis
%K chromosome
%K aberration
%K nucleoli
%K silver
%K staining
%K technique.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=C24AF927F6D733539FC93E3E074A826A&yid=8A15F8B0AA0E5323&vid=5D311CA918CA9A03&iid=CA4FD0336C81A37A&sid=659D3B06EBF534A7&eid=DB817633AA4F79B9&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=0