Kobayashi Nanami, Nishikawa Shuh-Ichi
Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan.
Faculty of Science, Niigata University, Niigata 950-2181, Japan.
Plants (Basel). 2023 Oct 18;12(20):3608. doi: 10.3390/plants12203608.
Nuclear fusion is essential for the sexual reproduction of various organisms, including plants, animals, and fungi. During the life cycle of flowering plants, nuclear fusion occurs three times: once during female gametogenesis and twice during double fertilization, when two sperm cells fertilize the egg and the central cell. Haploid nuclei migrate in an actin filament-dependent manner to become in close contact and, then, two nuclei fuse. The nuclear fusion process in plant reproduction is achieved through sequential nuclear membrane fusion events. Recent molecular genetic analyses using showed the conservation of nuclear membrane fusion machinery between plants and the budding yeast . These include the heat-shock protein 70 in the endoplasmic reticulum and the conserved nuclear membrane proteins. Analyses of the mutants of these components show that the completion of the sperm nuclear fusion at fertilization is essential for proper embryo and endosperm development.
核融合对于包括植物、动物和真菌在内的各种生物体的有性繁殖至关重要。在开花植物的生命周期中，核融合发生三次：一次在雌配子发生过程中，两次在双受精过程中，即两个精细胞分别使卵细胞和中央细胞受精时。单倍体细胞核以肌动蛋白丝依赖的方式迁移，紧密接触，然后两个细胞核融合。植物繁殖中的核融合过程是通过一系列核膜融合事件实现的。最近使用……进行的分子遗传学分析表明，植物和芽殖酵母之间核膜融合机制具有保守性。这些包括内质网中的热休克蛋白70和保守的核膜蛋白。对这些成分的……突变体的分析表明，受精时精核融合的完成对于胚胎和胚乳的正常发育至关重要。
