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tetrads

网络  四联球菌; 四分体; 四元组; 四体花粉

双语例句

  • 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)。
  • 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。
  • 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。
  • 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。
  • 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。
  • 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。
  • Most macrospore tetrads are linear and a few are T-shaped;
    大孢子四分体多数为直线形排列,少数为T字形排列;
  • 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。
  • The meiosis behavior of pollen mother cell of sterile plant was normal and tetrads were formed. However degradation of tetrad callose wall was abnormal.
    不育株花粉母细胞减数分裂过程基本正常,可形成四分体,但四分体胼胝质壁不能适时解体,小孢子或于胼胝质壁内彻底败育解体,或发育至单核中期败育;
  • 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。