columellae
英
美
n. 小柱；螺的轴柱
columella的复数
双语例句
- The exine of sterile pollen was not perfectly differentiated even at big-vacuole pollen stage, and ATPase was localized in nucleus, mitochondria, intine, malformed columellae and on the surface of the tectum.
单核边位期不育花粉仍不能形成良好的外壁，ATPase主要定位于核、内壁和线粒体，覆盖层外侧和不规则的柱状层也具有ATPase活性。