常見例句SOD activity of both types of sterile lines showed a downtrend from uninucleate stage to trinucleate stage. 2類型不育系SOD活性從單核期到三核期都一直呈下降趨勢。Therefore, it could be inferred that the abortive processes and stages of the two sterile lines were almost the same;and that the key stages of pollen abortion were from uninucleate to trinucleate. 推斷2類不育系的敗育過程和敗育時期基本一致，花粉敗育的關(guān)鍵時期可能均為單核期到三核期。 返回 trinucleate