tetrad
英
美
网络 四分体; 四联球菌; 四联体; 四分子; 四分孢子
复数：tetrads
英英释义
noun
- the cardinal number that is the sum of three and one
双语例句
- From tetrad stage to microspore stage, the ABA content in sterile buds was higher than fertile buds.
四分体到小孢子单核期和小孢子二核后期至成熟花粉期不育花蕾ABA含量仍高于可育花蕾。 - Microspore abortion occured after the tetrad formation.
小孢子败育发生在四分体形成以后。 - The merit of viewing the four as a tetrad rather than selecting only three to form a triangle is that it gives greater prominence to quality.
把这四个变量看成是四元的而不是选出三个组合成三角形，它的优点在于：它给质量上带来了很多显著的帮助。 - Our main results were as follows: the ovary of male I degenerated and disappeared quickly upon megaspore tetrad degeneration, and developed into macrosporocytes;
结果发现：色木槭一期雄花（雄I）在大孢子四分体退化形成功能性大孢子时期，子房萎缩并迅速退化消失； - In the course of the embryonic development, after the microspore tetrad is formed, although some forms of the microspore were under developed, and lose of protoplasm, but some have formed normal microspore.
在胚胎发育过程中，小孢子四分体形成后，虽然出现有些小孢子形状不规则，原生质少或无等现象，但也有发育正常的花粉粒。 - The sporogenous cell functioned directly as megaspore mother cell. The tetrad of megaspores was linear in arrangement, and every megaspore might be functional.
孢原细胞平周分裂形成一个周缘细胞和一个造孢细胞，造孢细胞直接发育成大孢子母细胞，四分体大孢子呈线形排列，它们均可成为功能大孢子； - At both tetrad and pollen mother cell stages, the amount of polysaccharides in pollen cells of male sterility line was slightly higher than that of its maintainer lines.
在花粉母细胞和四分体时期，不育系细胞中多糖物质的含量稍高于保持系细胞中的含量，但它们之间差异不显著。 - This phenomenon occurs in the early tetrad stage.
这个现象在早期四分体阶段出现。 - The characteristics of tetrad was that the nucleus and Golgi bodies being in the active state.
四分孢子的显著特征是细胞核和高尔基体呈活跃状态。 - Chromosomes out of nuclei can be seen both at prophase ⅱ and tetrad period.
前期Ⅱ和四分体时期可观察到核外染色体；