| 水蕨孢子囊早期发育的超微结构 |
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| 引用本文： | 王赛赛,戴锡玲,王全喜.水蕨孢子囊早期发育的超微结构[J].西北植物学报,2011,31(9):1758-1764. |
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| 作者姓名： | 王赛赛 戴锡玲 王全喜 |
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| 作者单位： | 上海师范大学生命与环境科学学院,上海,200234 |
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| 基金项目： | 上海市教育委员会科研创新项目(10YZ73);上海市教育委员会重点学科建设项目(J50401) |
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| 摘 要： | 利用透射电镜对模式植物水蕨(Ceratopteris thalictroides)孢子囊的早期发育进行研究.结果表明:水蕨的孢子囊是由叶片表皮的原始细胞发育而来,经过横向和纵向分裂形成外套层原始细胞和内部细胞,此过程中各个细胞内线粒体和叶绿体逐渐变大,变发达;之后外套层原始细胞继续纵分裂形成孢子囊壁细胞,内部细胞分裂形成内外两层绒毡层和孢子母细胞,此过程中电子密集物在分裂最为旺盛的细胞内体积最大,数量最多;最后孢子母细胞减数分裂形成四分孢子,此时可见孢子之间以及孢子与原生质团之间均存在着表面膜.内层绒毡层为周原质团绒毡层,外层绒毡层为腺质型绒毡层.水蕨孢子囊的早期发育属于薄囊蕨型发育.
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| 关 键 词： | 水蕨 孢子囊发育 超微结构 绒毡层 |
Ultrastructure of Sporangium in Ceratopteris thalictroides(L.) Brongn.during the Early Development Stage |
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| WANG Sai-sai,DAI Xi-ling,WANG Quan-xi.Ultrastructure of Sporangium in Ceratopteris thalictroides(L.) Brongn.during the Early Development Stage[J].Acta Botanica Boreali-Occidentalia Sinica,2011,31(9):1758-1764. |
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| Authors: | WANG Sai-sai DAI Xi-ling WANG Quan-xi |
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| Institution: | WANG Sai-sai,DAI Xi-ling,WANG Quan-xi(Life and Environment Science College,Shanghai Normal University,Shanghai 200234,China) |
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| Abstract: | The formation and early development of sporangium of the fern Ceratopteris thalictroides(L.) Brongn.were studied by transmission electron microscopy.The results are as follows:Each sporangium originates from the epithelial cell of leaf,the cell undergoes longitudinal and transverse division,and produce external and internal cellular groups,while mitochondria and chloroplasts are becoming bigger and developed.The sporangium wall originate from the external group of cells,while the internal cellular group lea... |
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| Keywords: | Ceratopteris thalictroides(L ) Brongn sporangium development ultrastructure tapetum |
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