Abstract Pollen ontogeny and sporoderm development in Aristolochia manshuriensis were studied for elaboration of the inaperturete pollen ontogeny in Aristolochia. Despite the formation of apertures in the tetrad period, the sporoderm in A. manshuriensis becomes inaperturate at the end of the free microspore period. A similar immature exine is also detected in A. macrophylla. Variants of aperture formation in the tetrad period in A. manshuriensis or formation of a polar aperture in the free microspore period in A. clematitis are associated with types of microsporogenesis. The ectexine and endexine in A. manshuriensis are formed over a longer time and reached much greater thickness than those in A. clematitis. The endexine and intine in A. manshuriensis do not reach a mature state, similar to A. clematitis. The exine of A. manshuriensis cracks, releasing a pollen tube enveloped by the intine. This fact does not hinder the functioning of the male gametophyte of A. manshuriensis.

中文翻译：

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Aristolochia manshuriensis Komarov（马兜铃科）孢子皮超微结构与发育

摘要 对马兜铃花粉个体发育和孢子体发育进行了研究，以阐明马兜铃无孔花粉个体发育。尽管在四分体时期形成了孔，但在自由小孢子时期结束时，曼苏里曲霉中的孢子体变得无孔。在 A. macrophylla 中也检测到类似的未成熟外壁。A. manshuriensis 四分体时期孔形成的变异或 A. clematitis 游离小孢子时期形成的极孔与小孢子发生的类型有关。A. manshuriensis 中的 ectexine 和 endexine 形成的时间更长，并且比 A. clematitis 中的更厚。A. manshuriensis 的endexine 和intine 未达到成熟状态，类似于A. clematitis。A. manshuriensis 的外壁裂缝，释放被内脏包裹的花粉管。这一事实并不妨碍 A. manshuriensis 雄配子体的功能。