Dickinson H G, Heslop-Harrison J
Philos Trans R Soc Lond B Biol Sci. 1977 Mar 21;277(955):327-42. doi: 10.1098/rstb.1977.0021.
Evidence is presented from both observational and analytical techniques indicating profound changes to take place in the ribosome population during male and female meiosis in some flowering plants. During microsporogenesis these appear to involve the elimination of the major part of the ribosome complement early in the meiotic prophase, and its subsequent restoration by the disintegration in the tetrad cytoplasm of 'nucleoloids', themselves synthesized in the nucleus during late prophase. In female tissue the process is essentially similar except for differences in the restoration of the ribosome population. Immediately before the eradication of the ribosomes in both sexes, a sizeable proportion of the meiocyte cytoplasm is encapsulated by double, or multiple unit membrane profiles. Significantly this cytoplasm remains unaffected by the agents responsible for the degredation of the ribosome population. These events are also reflected in the organelle populations where cycles of dedifferentiation and redifferentiation take place. In view of evidence from other organisms, it is considered unlikely that these cycles are in any way a prerequisite of meiosis, but more a characteristic of cells undergoing major changes of phase, where a cytoplasmic 'clean-up' is required before the next stage of growth may begin.
来自观察和分析技术的证据表明，在一些开花植物的雄性和雌性减数分裂过程中，核糖体群体发生了深刻变化。在小孢子发生过程中，这些变化似乎涉及减数分裂前期早期核糖体大部分的消除，以及随后通过四分体细胞质中“核仁样体”的解体而恢复，这些核仁样体本身是在前期后期在细胞核中合成的。在雌性组织中，除了核糖体群体恢复方面的差异外，过程基本相似。在两性核糖体被消除之前，相当一部分减数分裂细胞质被双层或多层单位膜包裹。值得注意的是，这种细胞质不受导致核糖体群体降解的因素影响。这些事件也反映在细胞器群体中，其中发生去分化和再分化的循环。鉴于来自其他生物体的证据，认为这些循环不太可能以任何方式成为减数分裂的先决条件，而更像是经历主要阶段变化的细胞的一个特征，在进入下一生长阶段之前需要进行细胞质“清理”。
