盾叶薯蓣雄花发育、小孢子发生及雄配子体发育的研究

Studies on Development of Staminate,Microspore and Male Gametophyte of Dioscorea zingiberensis

大部分盾叶薯蓣为雌雄异株植物。在湖南省长沙市气候条件下,雄花花期为4月初至9月中。雄花花器小,每日17：30~19：30开放。小孢子母细胞减数分裂过程中,细胞质分裂为连续型,四分体为十字形。花药壁发育过程中,中层两层细胞紧贴,解体较早;绒毡层为腺质绒毡层,兼有部分变形绒毡层特征。

Most of Dioscorea zingiberensis are dioecious.The size of staminate is very small.The florescence of staminate is from April 5 to September 15 in Changsha Hunan province.The staminate blossoms from 17：30 to 19：30 every day during its florescence.The cytokinesis after meiosis of the microspore mother cells is successive and the tetrad is cross-type.Two layers of middle layer cells which stick closely are ephemeral.The tapetum is the glandular type and a little part of amoeboid.