长柱十大功劳大小孢子发生和雌雄配子体形成

 首次报道了长柱十大功劳(Mahonia duclouxiana Gagnep.)大小孢子发生和雌雄配子体形成过程.主要结果如下:花药4室,花药壁发育方式属双子叶型;药室内壁有带状加厚现象;腺质绒毡层,双核;多孢原,发生于表皮下;小孢子母细胞减数分裂的胞质分裂属连续型,形成双轴对称式四分体;散粉时花粉粒为2-细胞型,呈球形.雌蕊1枚1室,子房单心皮,边缘胎座,4~6枚胚珠,胚珠具双珠被,厚珠心;珠孔由两层珠被共同形成,呈"Z"字形;单孢原,位于珠心表皮下;直线形四分体,合点端的1个大孢子发育为功能大孢子,胚囊发育类型为蓼型.

Genesis of microspore,megaspore and the development of male gametophyte, female gametophyte in Mahonia duclouxiana Gagnep.

The microsporogenesis,megasporogensis and the formation of male gametophyte and female gametophyte in Mahonia duclouxiana were first reported.The main results can be concluded as follows: anthers are tetrasporangiate; the wall development is dicotyledonous type; glandular binucleate tapetum; endothecium of the chamber develops characteristic banded thickening during the maturation.Cytokinesis of meiosis in microsporocyte is successive and the tetrads are biaxial symmetrical.Pollen grains are mainly 2-cell type when shedding.Solitary pistil is monocarpellary with 4-6 ovules,marginal placenta,crassinucellate with double integument.Micropyle is formed in both inner and outer integument,shaped as "Z"; single archesporial cell locates under nucellar epidermis; the tetrad of megaspores is linear,the first cell from the chalazal end develops functional megaspore,the development of embryo sac is Polygonum type.