pollen tetrad

常見例句

雙語例句

• The process of pollen abortion begins with vacuole formation and gradual enlargement in the tetrad.
  花粉敗育的過程從四分體開始，細胞質內液泡逐漸增大，接著細胞器解體，細胞核解體。
• The microspores are arranged in a tetrahedral tetrad. The mature pollen grains are of the 2-celled and 3-celled types.
  小孢子四分體為四面體型排列，成熟花粉有2-細胞和3-細胞型2種。
• There occurs pollen abortion during the stage from tetrad to single nucleus pollen grain of cytoplasmic male-sterile line in Brassica napus Var. oleifera(Raphanus sativus L. ).
  甘蘭型油菜蘿卜細胞質雄性不育系的花粉敗育發(fā)生在四分體至單核花粉粒階段。
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