摘要： 用不同浓度的胺磺灵(Oryzalin)处理小麦种子,观察小麦根尖细胞染色体结构的变异情况。结果表明,胺磺灵的不同处理浓度及处理时间均能引起染色体的异常分裂,在光学显微镜下检测到桥、多极染色体、环状染色体、滞后染色体、染色体加倍、染色体凝集、微核等异常现象,以染色体加倍、微核的发生频率最高;处理时间对染色体结构变异的影响明显高于处理浓度。

关键词: 小麦, 根尖, 胺磺灵, 染色体变异

Abstract: In this study,the wheat root meristems were treated by different concentrations and treatment times of Oryzalin.Experiment results revealed that each concentration and treatment time could induce the cells to abnormal metaphase division.Chromosome-bridge,multipolar,rings,laggards,chromosome doubling,polymerization and micronuclei were observed.In these treatments,the rate of chromosome doubling and micronuclei were highest;The influence of treatment time inducing chromosomal aberration was more significantly than that of concentration.

Key words: Wheat, Root, Oryzalin, Chromsomal aberration

中图分类号: 

• S482.+5