Effects　of　Zn^（2＋）　on　root　growth，cell　division，and　nucleoli　of　Allium　cepa　L．

作     者：Liu Donghua Jiang Wusheng Wang Chunli (Department of Biology, Tianjin Normal University,Tianjin 300074,China)Zhai Lin (Xinhua High School , Tianjin 300204,China) 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：1996年第8卷第1期

页      面：21-27页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

主　　题：Allium cepa mitosis chromosome aberration nucleoli silver staining technique. 

摘      要：The effects of different concentrations of Zn￣(2+)ion on root growth,cell division,and nucleoli of Allium cepa were studied. The test Zn￣(2+) 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 Zn￣(2+) could obviously inhibit root growth at concentrations from 10￣(-4)to 10￣(-2) mol/*** 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￣(-4)to 10￣(-2) mol/L Zn￣(2+), e. g,the nucleolar particulate material scattered around the nucleoli in the nucleus of root tip cells.