hypocotyl是什么意思？

hypocotyl

英[ˌhaɪpə'kɒtɪl] 美[ˌhaɪpə'kɒtəl]

• n. 胚轴，子叶下轴；

例句

• Among cotyledon , petiole of cotyledon, hypocotyl, and radicle, hypocotyl has the most responsive explants to 2, 4 - D . 在子叶 、 叶柄 、 胚轴以及胚根四者当中, 下胚轴对2, 4-D 的反应状况最好.
• The results shew that hypocotyl's velocity, quality and differentiation were better than other explants. 结果表明:外植体为胚轴出愈速度快 、 质量好且分化率高.
• The transformation frequency of flax hypocotyl was about 2 %. 表明它们是转化植株,转化频率约为2%.
• As the development of the hypocotyl continues, the characteristic crook in the upper portion becomes apparent. 由于下胚轴继续发音, 上部特有的弯曲变得明显.
• At the onset of germination, the hypocotyl elongates rapidly by cell enlargement. 萌发开始时, 下胚轴依靠细胞增大而迅速伸长.

行业词典

• 医学： 〔下〕胚轴：植物胚芽的轴，或子叶附着点以下的实生苗，主根由此生长；
  植物学： 下胚轴；