被子植物有性生殖过程中的细胞程序死亡

细胞程序死亡是植物发育过程中的一种普遍现象。早就认识到高等植物生殖器官中一些细胞的死亡对植物有性生殖具有重要作用。这些细胞的死亡过程与动物组织中的细胞程序死亡基本相同。但植物体内诱导生殖细胞程序死亡的信号及其传导系统则显示出其特点 ,有些还表现出雌、雄性细胞的相互作用。探索植物生殖过程中的细胞程序死亡现象将有利于澄清植物生殖过程中的一些机理问题 ,使过去的细胞学研究结果深入到分子水平进行探讨

Programmed Cell Death During Sexual Reproduction in Angiosperms

The research of programmed cell death (PCD) in sexual reproduction in flowering plants is a new field that just began only a few years ago. Early histological and cytological studies indicated that some particular cells within male and female organs degenerate during reproductive development. The degeneration is very important for the sexual reproduction, and failure of the cells to enter the degeneration will result in sterility. Comparing with the research results of PCD in animals for reference, the degeneration and death of the particular cells and tissues in flowers in higher plants also possess PCD features, showing the degeneration and death during sexual plant reproduction with a view of the biochemical and molecular mechanisms. Besides the common features of PCD, some cell deaths during reproductive development are a result of interaction of male and female reproductive cells. Exploring the interaction will give us a deeper understanding for sexual plant reproduction. This review discusses various cell death phenomena during reproductive process of higher plants from biochemical and molecular level as a result of PCD, and preliminarily probes mechanism of PCD of reproductive organs and its importance for the fertility of flowers.