粟米草之胚胎學

Embryology of Mollugo Pentaphylla L.

花藥具4花粉囊，花藥壁發育屬單子葉型（Mono cotyledonous type）。花藥營養層為分泌型（secretary type），細胞具有雙核且為多倍體。細胞質分裂為同步型（simultaneous type）。四分體為四面體，十字對生或等面排列。花粉粒在傳粉時期具3個細胞。胚珠彎生，具兩層珠被花粉，屬厚珠心型（coassinucellate type）。珠孔由內珠被形成。大孢子四分體為線形排列（polygonum type）。胚囊發育為蓼型，具無壁式胚乳，胚的發育則屬茄型（solanad type）。

Anther is 4-sporangiate. Anther wall development is of the Monocotyledonous type. Anther tapetum is of the secretary type and its cells become 2-nucleate and polyploid. Cytokinesis is of the simultaneous type and pollen tetrads are tetrahedral, decussate and isobilateral. Pollen grains are 3-celled at shedding stage. The ovule is campylotropous, bitegmic and crassinucellate. Micropyle is formed by the inner integument. Megaspore tetrated is linear and embryo sac development is of the Polygonum type. Endosperm development is of the Nuclear type and embryo development follows Solanad type.