Histological study on the somatic embryogenesis and development of Saposhnikovia divaricata

Paraffin slice and semithin section are utilized to study the characteristics of morphogenesis and anatomical structure during the occurrence and development of somatic embryo in tissue culture of Saposhnikovia divaricata. The results show:(1)there are lots of starch in the embryogenetic cell,and gradually decreased accompanying the cell fission and differentiation;(2)the somatic embryogenesis and development experience all the stages of zygote embryo;(3)the multicellular embryo is developed from periclinal division primarily,and accordantly grows regularly;(4)there is distinct boundary between the different stages of somatic embryo and the cells around;(5)the suspensor isn’t obvious;(6)the abnormal joined embryo is caused by the high density of embryonic cells, and the subordinate embryo is caused by the new occurrence center produced by the original embryo.