园艺学报2025，Vol.52Issue(12)：3157-3166,10.DOI:10.16420/j.issn.0513-353x.2025-0560
壶瓶枣大小孢子发生与雌雄配子体发育
Sporogenesis and Gametogenesis of Ziziphus jujuba'Hupingzao'
摘要
Abstract
Observing sporogenesis and gametogenesis is a fundamental step in revealing the mechanism of embryo abortion in Ziziphus jujuba'Hupingzao'.The occurrence of megasporogenesis,microsporogenesis as well as the development of female and male gametophyte of'Hupingzao'were studied by paraffin sectioning technique in this paper.Each anther has four pollen sacs.The anther wall is composed of an epidermis,an endothecium,two middle layers,and a secretory tapetum,and its development type is the basic type.Following meiosis,the microspore mother cells forme tetrahedral tetrads through simultaneous cytokinesis.The mature pollen grains are two-celled with three pollen apertures.The ovule is anatropous,and the ovary is bilocular with one ovule per locule.The megaspore mother cell undergo meiosis to form a linear tetrad along the longitudinal axis.The chalazal megaspore develops into the functional megaspore.The female gametophyte develops through binucleate and four-nucleate embryo sac stages,ultimately formed a mature 7-celled,8-nucleate embryo sac.Embryo sac development is the polygonum type.'Hupingzao'exhibits dichogamy,with stamens developing earlier than pistils.关键词
枣/壶瓶枣/小孢子发生/大孢子发生/雄配子体/雌配子体Key words
Ziziphus jujuba/Hupingzao/microsporogenesis/megasporogenesis/male gametophyte/female gametophyte分类
农业科技引用本文复制引用
郭红彦,武晋帆,向敏,蒋少东,赵爱玲..壶瓶枣大小孢子发生与雌雄配子体发育[J].园艺学报,2025,52(12):3157-3166,10.基金项目
现代农业产业技术体系建设专项资助(CARS-30-1-07) （CARS-30-1-07）
晋财政林地补偿-山西省林木种质资源收集项目(TK254702010) （TK254702010）
