Kravets E A, Sidorchuk Yu V, Horyunova I I, Plohovskaya S H, Mursalimov S R, Deineko E V, Yemets A I, Blume Ya B
Tsitol Genet. 2016 Sep-Oct;50(5):3-16.
A comparative cytological analysis of intra- and intertissular cytomictic interactions in early micro-sporogenesis of mono- and dicotyledonous plants was performed by the example of the two cellular systems - microsporocytes and tapetum. It is found that cytomixis is the component of intratissular interactions mainly. In the tapetum cells cytomixis is notable for structural and temporary taxon specific features. The nuclear migration in microsporocytes is confined mainly to zygotene-pachytene meiotic stages and characterized by a certain synchronism with cytomixis at the tapetum. Intertissular cytomictic interactions (tapetum - microsporocytes) were found in the monocot anthers only. Intertissular interactions are likely to reflect the intensification of competitive relations between the tapetum and microsporocytes for area in the process of anther tissue differentiation. Polyploid tapetum nucleus and syncytia being powerful acceptors are able to compete with microsporocytes and direct the chromatin translocation to their favor. The absence of intertissular interactions in dicots probably reflects a better balance between the processes of differentiation at somatic and generative tissues into microsporangium compared to monocots.
以小孢子母细胞和绒毡层这两个细胞系统为例，对单子叶植物和双子叶植物早期小孢子发生过程中组织内和组织间细胞融合相互作用进行了比较细胞学分析。结果发现，细胞融合主要是组织内相互作用的组成部分。在绒毡层细胞中，细胞融合具有结构和时间上的分类群特异性特征。小孢子母细胞中的核迁移主要局限于偶线期 - 粗线期减数分裂阶段，并且与绒毡层中的细胞融合具有一定的同步性。仅在单子叶植物的花药中发现了组织间细胞融合相互作用（绒毡层 - 小孢子母细胞）。组织间相互作用可能反映了在花药组织分化过程中，绒毡层和小孢子母细胞之间对空间竞争关系的强化。多倍体绒毡层细胞核和多核体作为强大的受体，能够与小孢子母细胞竞争，并引导染色质向有利于它们的方向转移。双子叶植物中不存在组织间相互作用，这可能反映出与单子叶植物相比，体细胞和生殖组织分化为小孢子囊的过程之间具有更好的平衡。
