tetrads

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网络  四联球菌; 四分体; 四元组; 四体花粉

双语例句

• Cytological observation on the transgenic plants indicated that abortion of microspore development occurred at the stages of from tetrads to uninucleate.
  通过对转基因植株进行细胞学染色、切片观察等方法，显示转基因后代小孢子败育发生在四分体到单核期。
• Ultrastructure and development of the microspore in Cunninghamia lanceolata ( lamb.) hook& ⅱ. tetrads, microspore, and tapetum
  杉木小孢子发育过程中细胞的超微结构&Ⅱ.四分体、小孢子、绒毡层
• The results showed that the type of microsporic tetrads of the simple flower is belong to tetrahedral type and the mature pollen is two-celled with bristles on the surface.
  单瓣紫花木槿的小孢子母细胞经过减数分裂形成四面体状的四分体，成熟花粉是二细胞型花粉，圆球型，表面有刺毛。
• The results indicated that the pollen mother cells carried on their meiosis and cytokinesis simultaneously and their tetrads were tetrahedral or decussate types;
  结果表明：花粉母细胞减数分裂的细胞质分裂为同时型，四分体为正四面体型或十字交叉型；
• Based on this, double exchange of tetrads and centromere mapping are analysed and discussed in detail.
  在此基础上，对双交换四分子的分析和着丝粒作图进行了详细地讨论。
• Hypertrophy and hyperplasia of tapetum at tetrads stage were related to pollen abortion.
  四分体时期绒毡层肥大增厚可能与花粉败育有关。
• The tetrads are linear, few triads.
  四分体线形，少数三分体。
• Predominant linear and a few "T"-shaped megaspore tetrads with chalazal functional one; The first one towards the chalazal end of four megaspores that are arranged in one row is functional.
  少数为T字形排列，合点端大孢子有功能；直线形大孢子四分体，合点端大孢子有功能，三次核分裂的单孢子胚囊类型（蓼型）。
• Cytokinesis in the MMC accompanies meiosis and the megaspore tetrads are linear or T-shaped.
  大孢子四分体为直线形或T形排列。
• It is not clear whether the abortion of the tetrads stimulates proliferation of the tapetal cells or the proliferating tapetum actually interferes with microspore development, thereby causing degeneration.
  由于绒毡层细胞异常膨大，挤压四分体，四分体不分离产生四分小孢子，从而不能形成正常的花粉粒而导致败育。