细胞外层

The term epiblem is sometimes used instead to denote the outermost layer of cells in the root.

有时用根被这一名称来表示根最外胞。

The cells above the stratum basale were polygonal cells with central nucleus and cytoplasm filled with rough endoplasmic reticulum, ribosome, golgi apparatus and tonofibril.

棘胞外至腺上游离面嗜胞密集排列。

Exodermis An outermost layer of thickened or suberized cortical cells that sometimes replaces the epidermal layer in the older parts of roots if the epidermal cells have died.

或木栓化胞最外。如果根较老部分表胞死亡，它通常取而代之。