植物学报 ›› 1998, Vol. 15 ›› Issue (03): 34-37.

• 研究报告 • 上一篇    下一篇

中国鹅掌楸小孢子发生的细胞化学研究

尹增芳 樊汝汶   

  1. (南京林业大学 南京 210037)
  • 出版日期:1998-05-20 发布日期:1998-05-20
  • 通讯作者: 尹增芳

Cytochemical Study on The Miocosporogenesis of Liriodendron chinense (Hemsl.) Sarg

YIN Zeng-Fang and FAN Ru-Wen   

  1. (Nanjing Forestry University, Nanjing 210037)
  • Online:1998-05-20 Published:1998-05-20
  • Contact: YIN Zeng-Fang

摘要: 多糖、脂类和蛋白质的消长变化与花粉发育过程中营养供应存在着密切的关系。雄蕊特别是花药壁内的多糖在减数分裂过程中逐渐消耗殆尽。初期的小孢子母细胞内脂滴的含量丰富,无淀粉粒,也无颗粒状的蛋白质。进行减数分裂的小孢子母细胞内、中层及绒毡层细胞积累了大量的蛋白质与脂类;减数分裂完成后,绒毡层和四分体小孢子开始逐渐积累淀粉与脂类,但蛋白质的含量较少,至小孢子时期,小孢子壁及绒毡层细胞的径切向壁和内切向壁沉积了大量的脂类物质,而且小孢子核周围分布大量淀粉粒,未观察到蛋白质颗粒。

Abstract: There is a close relationship between the change (increase or decrease) of polysaccharide, lipid and protein with the suppliment of nutrition during the development of pollen. The polysaccharide disapper from the wall layers gradually during the stage of meiosis. There is a great deal of lipid in the early stage of pollen mother cell, but there is neither amyloplastid nor protein grain showing. In the pollen mother cell the middle layers and tapetum accumulated a great deal of protein and lipid during the early stage of pollen mother cell, but there is neither amyloplastid nor protein showing. The middle layers and tapetum accumulated a great deal of protein and lipid during the stage of meiosis. Having finished meiosis the amyloplastid and lipid begin to appear in the tapetum and microspore tetrad, and the protein is induced. In the stage of microspore, there is a great deal of amyloplastid around the nuclear of microspore, and lipid is deposited on the wall of microspore and the radial, and on the endoscopic wall of tapetum cell. Meanwhile, the protein grain is not observed.