蕨类植物精细胞运动器和细胞骨架的研究

介绍了近年来蕨类植物游动精子运动器和细胞骨架的研究进展.游动精子由配子体精子器中的非运动细胞发育形成,其分化过程包括了运动器官和细胞骨架的合成和组装.精子发生过程中形成的运动器的各部分结构包括鞭毛、基体、多层结构及附属结构;基体是细胞中新形成的结构,在不同类群的蕨类植物中分别由双中心粒、分支生毛体和生毛体产生.鞭毛、基体和多层结构中的微管带形成了游动精子三个独特的微管列阵,由于微管蛋白的后修饰作用这些微管列阵十分稳定;centrin是运动器中的重要成分,但功能尚不清楚,可能和细胞骨架及运动器的构建有关.

The Studies of the Locomotory Apparatus and Cytoskeleton in the Spermatozoid of Ferns

The authers reviewed recent advances in the study of the structure and development oflocomotory apparatus and cytoskeleton in the spermatozoid of ferns. The spermatozoids developfrom non-motile cells within the antheridia of ferns. Their differentiation process involves the synthe-sis and assembly of cytoskeleton and motile apparatus. The locomotory apparatus that emergesduring the spermiogenesis consists of the multilayered structure (MLS), basal bodies, flagella andaccessory structures. Basal bodies are the structures developed from bicentriole, the branched ble-pharoplast and blepharoplast, respectively, depending on the specific group of ferns concerned.Basal bodies, together with flagella and spline of the MLS, formed three distinct and unique microtu-bule arrays. The posttranslational modifications in tubulin provide considerable stability to thosearrays. Centrin is a major constituent of locomotory apparatus, though its function is unclear. Somestudies suggest that it is needed in the formation of the cytoskeleton and the locomotory apparatus.