胚根

Both root and root cap are covered by a sheath - like structure called the coleorhiza.

根和根冠被一鞘 状 结构，即胚根鞘所覆盖。

Coleorhiza ( pl . coleorhizae ) The protective sheath surrounding the radicle in grasses.

胚根鞘：保护幼根的鞘状结构。

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。

Moreover , these secretion also caused embryo withering and brown, unhealthy radicles and seedling.

胚萎缩，褐变，胚根生长不良， 幼苗矮小，生长受阻。