本文报道水杉(Metasequoia glyptostroboides Hu et Cheng)花粉外壁透射电镜资料,与杉科各属花粉特征做了比较。根据透射电镜观察表明,水杉花粉外壁由外壁外层和外壁内层组成。外壁外层由紧密联结的颗粒层和分布稀少的乌氏体组成。后者表面具小刺及不明显的纵向小沟。外壁内层具十分清楚的片层状结构,由10—15片组成。全部片层均具三层型结构,最外面(靠近外层)的几片,三层型结构特别清楚、明晰。有的三层型结构层中间的白线松散,形成三根极细的白线。
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Cheng, 1948:On the family Metasequoiaceae and on Metasequoia glyptostroboides, a living species of the genus Metasequoia found in Szechuan and Hubei, Bull, Fan.Mem. Inst, Biol. Hu,H. H. and W. C. N. S .
[1]
Cheng, 1948:On the family Metasequoiaceae and on Metasequoia glyptostroboides, a living species of the genus Metasequoia found in Szechuan and Hubei, Bull, Fan.Mem. Inst, Biol. Hu,H. H. and W. C. N. S .