Marks G E
J Cell Sci. 1975 Jun;18(1):19-25. doi: 10.1242/jcs.18.1.19.
The centromere regions of each chromosome in the complement of Nigella damascena (2n equals 2x equals 12) stain differentially with Giemsa at interphase and throughout all the principal stages of mitosis and meiosis. Each centromere is seen to consist of a pair of sister half-centromeres which appear as 2 differentially stained dots. The appearance and behaviour of these dots indicates that they are kinetochores. The technique used does not stain centromeres in other plant species investigated, a fact which shows that the centromeres of Nigella are in some way different. The implications of this observation in relation to centromere polymorphism are discussed.
黑种草（2n = 2x = 12）染色体组中每条染色体的着丝粒区域在间期以及有丝分裂和减数分裂的所有主要阶段，用吉姆萨染色时呈现出不同的染色效果。每个着丝粒由一对姐妹半着丝粒组成，表现为两个染色不同的点。这些点的外观和行为表明它们是动粒。所使用的技术在其他所研究的植物物种中不着色着丝粒，这一事实表明黑种草的着丝粒在某些方面有所不同。本文讨论了这一观察结果与着丝粒多态性的关系。
