Spike Walker (2011) CIL:39065, Allium cepa, root cell. CIL. Dataset

This is a region of a (semithin) longitudinal section of onion root taken from the meristematic zone; this is the undifferentiated region of plant tissue from which new cells are formed. Therefore, it is a region of high cell division. The cells in this image are in various stages of mitosis. Mitosis is the process of cell duplication in which two daughter cells are produced from a single parent cell containing the same amount of DNA. The top layer of cells are all in interphase (the stage of DNA replication). The second layer down shows two cells (central) in prophase (DNA condenses into chromosomes and the mitotic spindle begins to form). The third row has a cell in early anaphase (chromosomes clearly attached to spindle and moving towards opposite poles) and two cells which have just divided and the daughter cells have not yet grown to their full size. The semithin section is so thin it has missed the nucleus in some of the cells, or has only cut through part of it so some look smaller in comparison to others.

本数据集展示了从洋葱根的分生区截取的（半薄）纵向切片区域；该区域为植物组织的未分化区域，新细胞即由此处形成，因此，该区域细胞分裂活跃。图像中的细胞处于有丝分裂的不同阶段。有丝分裂是细胞复制的进程，由单个含有相同DNA量的母细胞分裂成两个子细胞。顶层的细胞均处于间期（DNA复制阶段）。向下第二层显示两个细胞（中央）处于前期（DNA凝结成染色体，有丝分裂纺锤体开始形成）。第三排有一个细胞处于早期后期（染色体清晰附着于纺锤体并朝向两极移动），以及两个刚刚分裂的细胞，其子细胞尚未生长到完全大小。由于半薄切片非常薄，一些细胞中的细胞核未能完整显示，或仅切割到部分细胞核，因此与其它细胞相比，部分细胞看起来较小。