Kondakova Ekaterina, Neklyudova Irina, Efremov Vladimir
7/9 Universitetskaya nab.,St Petersburg,199034Russia.
1-12 Leninskie Gory,Moscow,119991Russia.
Zygote. 2017 Aug;25(4):489-497. doi: 10.1017/S0967199417000314. Epub 2017 Jul 4.
The yolk syncytial layer (YSL) of Teleostei is a dynamic multifunctional temporary system. This paper describes the YSL structure of Misgurnus fossilis (Cobitidae) during its early developmental stages, studied using histological methods. YSL formation is prolonged. From the late blastula stage, the basal surface of the YSL is uneven and has protuberances, but becomes smoother during development. There are syncytial 'islands' with 1-2 yolk syncytial nuclei in the yolk mass. During epiboly, gastrulation and early segmentation, loach YSL is of different thickness in different regions along the dorso-ventral and antero-posterior axes of an embryo. The YSL is thickened in the dorsal region of gastrulae compared with the ventral region. Although the development of M. fossilis is similar to the development of zebrafish, there are important differences in YSL formation and organization that await further study and analysis. The study of YSL organization contributes to our knowledge of teleost developmental diversity and to the biology of temporary structures.
硬骨鱼纲的卵黄合胞体层（YSL）是一个动态的多功能临时系统。本文描述了用组织学方法研究的泥鳅（鳅科）早期发育阶段的YSL结构。YSL的形成过程较长。从囊胚晚期开始，YSL的基底表面不平整且有突起，但在发育过程中会变得更光滑。卵黄块中有含有1-2个卵黄合胞体细胞核的合胞体“岛”。在外包、原肠胚形成和早期卵裂期间，泥鳅的YSL在胚胎的背腹轴和前后轴的不同区域厚度不同。与腹侧区域相比，原肠胚的背侧区域YSL增厚。虽然泥鳅的发育与斑马鱼的发育相似，但在YSL的形成和组织方面存在重要差异，有待进一步研究和分析。对YSL组织的研究有助于我们了解硬骨鱼发育的多样性以及临时结构的生物学特性。
