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

• 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）。
• 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。
• Some microspore tetrads which conglutinated with each other formed complex microspore tetrads on white cucumber.
  白皮黄瓜部分小孢子四分体之间相互粘连在一起，相互粘连的胼胝质壁水解形成复合小孢子四分体；
• 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。
• 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。
• The insoluble polysaccharides are at very low level in the MMC, tetrads and functional megaspore stages while RNA and protein are at higher level in all of them.
  大孢子母细胞、大孢子四分体及功能大孢子中含较少不溶性多糖，但却含丰富的RNA和蛋白质。
• 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。
• The shapes and forms of tetrahedral tetrads grains may be described with a new method of polar coordinate that is more exact and more direct than with traditional measurement method of polar axis ( P) and equatorial axis ( E).
  用极坐标法描述四合体花粉的新方法可以表现其饱满度，比较传统上用极轴、赤道轴的长短表现花粉平面大小的方法，更加准确而直观。
• Cytological analysis showed a large number of abnormal tetrads in mutant anther, especially hexads, pentads and irregular tetrads, which indicated abnormalities in meiosis.
  细胞学观察发现突变体的花药中形成大量异常的四分体，特别是六分体、五分体和不规则的四分体，这表明突变体的减数分裂可能出现问题。