枸杞优良新品系NQ-2小孢子发生和雄配子体发育

Microsporogenesis and Development of Male Gametophyte of Lycium barbarum L. NQ-2

利用常规石蜡切片法研究了枸杞优新品系NQ-2小孢子发生和雄配子体发育的过程。结果表明:枸杞新品系NQ-2花药壁发育类型为双子叶型,由表皮、纤维层细胞、中层细胞和绒毡层细胞4层构成,绒毡层为双重起源,发育呈二型性,属分泌型;小孢子母细胞分裂为同时型,四分体为四面体型;成熟花粉粒含2个细胞,具三孔沟型萌发孔。

The development process of microsporogenesis and male gametophyte of Lycium barbarum L.NQ-2 using normal paraffin method were studied.The results showed that the anther wall developmentl belongs to the dicotyledonous type and it＇s composed of 4 layers,which were epidermis,endothecium,middle layer and tapetum,the tapetum was not only dual in origin but also dimorphic,belongs to secretory tapetum.Meiosis of pollen mother cells was simultaneous type,tetrads were tetrahedral.There were three colpi on the extine of mature pollen grain and each of them has a pore in the center.