摘要在进行实验室细胞分裂实验过程中,洋葱、大蒜等幼嫩根尖分生组织由于细胞分裂旺盛、培养便捷、细胞易破碎、染色体数量少等特点,时常作为实验材料用以观察分裂过程中染色体的行为。染色体是遗传物质DNA的载体,顾名思义也是能被碱性物质着色的物质。因此,在实验过程中,一定组织形态的细胞须经一定浓度的特定染液染色后,方能观察到染色体的行为。而染液染色时间的长久最终影响片子的清晰度,在实验过程中也较难掌控时间。染色时间过久或不足均不利片子的观察,影响其清晰度。本课题通过对大蒜根尖细胞不同染色时间处理,观察片子中染色体的染色均匀度及染色体分裂行为的清晰度,以及获得一定浓度和染液的最佳染色时间,为实验教学提供重要参考。47907
Abstract The process of cell pision experiment in the laboratory, Onion, Garlic and other young apical meristem because cell pision exuberant, cultured convenient, cells easily broken and chromosomes number is small of etc characteristics, often used as experimental materials to observe the process of splitting the chromosome behavior. Chromosome is the carrier of genetic material DNA, As the name suggests is to be alkaline substance coloring material. Thus, during the experiment, after a certain concentration of a particular subject cell staining dye liquor certain tissue morphology, can only be observed chromosome behavior. The dyeing time and ultimately affect the clarity of the film, during the course of the experiment is also difficult to control time. The staining time is too long or short are all unfavorable of Observation of film, effect of clarity. In this topic, Processing of different staining time of through the garlic root tip cells, Chromosome dyeing evenness and Chromosome pision behavior clarity in film of Observation, And get a certain concentration and the best time of dye dyeing, To provide an important reference for the experimental teaching.
毕业论文关键词:大蒜根尖细胞: 有丝分裂制片: 染色时间; 影响
Keyword: Garlic root tip cells; Mitotic production; dyeing time; affect
目 录
引言 4
1.大蒜对植物遗传学有丝分裂研究的作用和联系 4
1.1植物根尖各组织的的介绍 4
1.2植物分生组织的主要作用 4
1.3植物分生组织细胞对遗传学寄予的贡献 5
2.大蒜—遗传学研究的主要模式植物 5
2.1大蒜 5
3.实验设计方案培养 5
3.1实验材料,仪器,药品,用具 5
3.2实验步骤 6
3.3大蒜根尖培养并注意事项 6
3.4根尖固定解离和冲洗及注意事项 6
3.5压片和主要染色方法 7
3.6镜检及时间的控制 7
4.实验结果 7
5.讨论 11
参考文献 12
致谢 12
引言
有丝分裂—真核生物细胞是以一分为二的将本身细胞核中的染色体同等分配到两个子核中的分裂方式。随着细胞核的分裂,带动细胞膜、细胞器与细胞质等细胞结构平均的分配到两个细胞中。这一过程被称之为M期,也就是有丝分裂与细胞质分裂同意称为细胞周期的分裂期;这个过程产生两个与母细胞基因相同的子细胞。这个过程一般约占整个细胞周期的十分之一。 染色时间对大蒜根尖细胞有丝分裂制片的影响:http://www.751com.cn/shengwu/lunwen_50195.html