Cytoplasmic filaments and morphogenetic movement in the amphibian neural tube
[摘要] CellsofthemedullaryplateandgroovewerestudiedwiththeelectronmicroscopeduringneurulationinHylaregillaandXenopuslaevisinanattempttolocatestructuresthatmightbeinvolvedinmorphogeneticmovement.Theapicesoftheneuralplatecellscontainathinbandoffilamentsalignedparalleltotheoutersurfaceoftheplate.Asneurulationproceeds,thegroovenarrowsanddeepens;correspondingly,thecellapicesnarrow,theapicalbandbecomesbroaderandcrowdedwithorientedfilaments,andthecellbodyassumesalongcolumnarorbottleshape.InXenopusfilamentsarearrangedcircularlyaroundthecellneck.Thecellapicesaretightlyjoinedtooneanother.Itisproposedthatfilamentcontractioncausestheneuralplatetoinvaginate.Thistheoryisdiscussedinrelationtoothertheoriesofneurulationandmorphogeneticmovements.
[发布日期] [发布机构]
[效力级别] [学科分类] 生物科学（综合）
[关键词] [时效性]
