荚果蕨胚胎发育的研究

Development of Embryo in Matteuccia struthiopteris(L.) Todaro

利用石蜡切片法研究了荚果蕨(Matteuccia struthiopteris(L.)Todaro)胚胎发育过程。合子第一次分裂,分裂面垂直于原叶体纵轴且平行于颈卵器颈部;第二次分裂面平行于原叶体纵轴且垂直于颈卵器颈部;第三次分裂面同时平行于原叶体纵轴和颈卵器颈部。经多次分裂的球形胚胎,胚胎的外上和外下区域几乎同时分别发育出第一叶顶端细胞和第一根顶端细胞。随着发育的进行,它们分别斜向分裂产生第一叶原基和第一根原基。随后,第一叶原基迅速分裂,突破帽状体形成第一幼叶;而第一根原基的分裂速度稍慢,第一根发育速度稍慢于第一叶。

This paper gives some details on the development of embryo in Matteuccia struthiopteris（L.） Todaro.The first zygote division,splitting the plane perpendicular to the prothallus,and parallel to the longitudinal axis of the archegonium neck;second division plane parallel to the prothallus and perpendicular to the longitudinal axis of the archegonium neck;the third division plane parallel to the longitudinal axis and the prothallus perpendicular to the archegonium neck.When the embryo reaches to the Spherical phase,the outer and outside areas of embryos which develop the first top leaf cell and the first top root cell separately at the same time.These were produced division first leaf primordium and the first root primordium.Subsequently,the first leaf primordium rapidly divides,breaking the cap-like formation and became first young leaves;the first root primordium split slower than the first leaf primordium and speed of the first root grows is slower than the first leaf.