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
- The abnormality of tetrad callose wall degradation and tapetum development was associated with the abortion of microspore.
导致小孢子败育的原因与四分体胼胝质壁不适时解体和绒毡层细胞发育异常、延迟解体有关。 - The process of pollen abortion begins with vacuole formation and gradual enlargement in the tetrad.
花粉败育的过程从四分体开始，细胞质内液泡逐渐增大，接着细胞器解体，细胞核解体。 - Microspore mother cells meiosis was conformed to simultaneous type with mostly tetrahedral and decussate tetrad.
小孢子母细胞减数分裂属于同时型，小孢子在四分体中的排列方式多数为四面体形，少数为十字交叉形。 - There is only one layer of parietal cells at the stage of sporogenous cell, megaspore mother cell and tetrad.
造孢细胞，大孢子母细胞和四分体时期，周缘细胞仅1层。 - 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； - 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。 - Tapetum cell hyperplasia from the tetrad to the single nucleus early period.
绒毡层细胞在四分体&单核早期发生增生； - Pollen abortion of MS-4 was in the single nucleus pollen grain stage after the division of microspore tetrad.
MS-4花粉败育的时期，是在小孢子四分体分开至单核花粉粒时期。 - 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。