期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
The Effect of Different Pretreatment on Mitosis
摘要/Abstract
摘要：
试验观察了不同预处理方法对洋葱根尖有丝分裂的影响，研究表明，经0.2%秋水仙素处理能够极显著地提高有丝分裂指数，为对照的3.20倍；低温处理也能极显著地提高有丝分裂指数，为对照的2.57倍.在一般教学实验中，低温处理为观察有丝分裂首选的预处理方法.
Abstract：
The effect of different pretreatment on mitosis of onion root tip was studied. The results showed that among the four pretreatments, the 0.2% colchicines pretreatment could increase the mitotic index vitally apparently, which was 3. 2 times of that of the control; the low-temperature pretreatment could also increase the mitotic index by 1.57 times, and it is also the primary choice in most of the teaching experiments.
关键词
Key words：
mitosis
;
pretreatment
;
mitotic index
;
colchicines
;
low-temperature