摘要
运用石蜡切片技术对华北驼绒藜大、小孢子发生及雌、雄配子体的发育进行了研究.结果表明：（1）花药4室,花药壁由表皮、药室内壁、1-2层中层及1层绒毡层组成,药壁发育为基本型,腺质绒毡层,发育后期为二核或三核;（2）四分体胞质分裂为同时型,小孢子四分体多数为四面体型,偶见十字交叉型;（3）成熟花粉2-细胞型,单核小孢子时期存在不同比例的空壳花粉,从0%-80%不等;（4）胚珠倒生,双珠被,厚珠心,大孢子四分体直线型排列,合点端为功能大孢子,蓼型胚囊.
Traditional paraffin sectioning method was used to observe the development of megasporore,microsporore,male and female gametophytes. The result showed. （1）the anther has four chambers and the development of anther wall is elementary type,which is composed of epidermis,endothecium,has 1-2 middle layers and one tapetum layer. The tapetum belongs to glandular type （2）The cytokinesis of microspore mother cell in meiosis is simuteneous,and most of the tetrad are tetrahedral,decussation is also observed（3）Empty pollen grains are observed at the stage of haploid nuclear microspore mature pollen grain is 2- cells;（4） Ovule is anatropous, bitegminous and crassinucellate, micropyle is formed by the inner integument. The megaspore mother cells undergo meiosis division to form a linear tetrad,and the chalazal megaspore is the functional one,the embryo sac is‘Polygonum type’.
出处
《西北植物学报》
CAS
CSCD
北大核心
2008年第7期1319-1325,共7页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金项目资助(30560099)
关键词
华北驼绒藜
大孢子发生
小孢子发生
雌配子体
雄配子体
Ceratoides a rborescens megasporogenesis
microsporogenesis male gametophyte
female gametophyte
