植物研究2025，Vol.45Issue(2)：211-216,6.DOI:10.7525/j.issn.1673-5102.2025.02.007
多花黄精大小孢子发生及雌雄配子体发育
Sporogenesis and Gametogenesis of Polygonatum cyrtonema
摘要
Abstract
The floral bud development of Polygonatum cyrtonema was examined at various stages using paraffin sectioning techniques,the characteristics of megasporogenesis and microsporogenesis and the development process of male and female gametophytes were explored respectively,the fundamental data for the genetic improvement and breeding of P.cyrtonema was provided.The results showed that:(1)The anther wall was composed of epidermis,endothecium,middle layer and tapetum layer.The tapetum layer was secretory,with mature tapetal cells exhibiting binucleate or multinucleate structures.The mature endothecium displayed fibrous thickened.(2)During the meiosis of microspore mother cell,cytokinesis occurred through a continuous type,resulting in tetrads arranged symmetrically in a linear pattern.Most mature pollen grains were two-cell type,occasionally three-cell type.(3)Meiosis of the megaspore mother cell produced a linear tetrad,and the development of the embryo sac followed the Polygonum type.The reproductive cellular development in P.cyrtonema demonstrated similarities to other members of the Polygonatum genus.Notably,the presence of a secretory tapetum and the three-celled pollen grain suggests that P.cyrtonema might have a relatively advanced evolutionary status.关键词
多花黄精/大小孢子发生/雌雄配子体Key words
Polygonatum cyrtonema/megasporogenesis and microsporogenesis/male and female gametophytes分类
生物学引用本文复制引用
张棋,李佳音,王海燕,马子钦,何夫..多花黄精大小孢子发生及雌雄配子体发育[J].植物研究,2025,45(2):211-216,6.基金项目
湖北省中央引导地方发展专项(Z2022387). （Z2022387）
