花叶开唇兰（兰科）大小孢子发生和雌雄配子体发育

MEGA- AND MICROSPOROGENESIS AND DEVELOPMENT OF FEMALE AND MALE GAMETOPHYTES IN ANOECTOCHILUS ROXBURGHII (ORCHIDACEAE)

摘要:

花叶开唇兰的胚珠倒生，双珠被，薄珠心．雌配子体发育属蓼型，成熟胚囊７细胞．大小孢子发生过程中壁上都有胼胝质出现．小孢子四分体为四面体形，左右对称形，交叉形，Ｔ形，它们聚集成花粉小块．花粉散出时为２细胞型．药室壁４层，绒毡层底分泌型．

Abstract:

Sporogenesis and the development of male and female gametophytes inAnoectochilus roxburghii are studied. The mature ovules are anatropous, bitegminous andtenuinucellatae. The development of the female gametophyte is of polygonum type. Matureembryo sac has 7 cells. In the development of mega- and microsporogenesis, calloseappears. The microspore tetrads are tetrahedral isobilateral, decussate, T-shaped and remainin massulae. At shedding stage the pollen grains are 2-celled. The anther wall consists offour-layers with secretory tapetum.