procambia

原形成层
常用释义
n. 原形成层;前形成层(procambium 的变形)

例句

1·The tracheid and sieve tube elements are all differentiated from the procambia in the center of the haustoria, and the former occurs prior to the latter.

吸器中管胞和筛管都是从吸器中央具有原形成层特性的细胞分化的,管胞的分化先于筛管,或同时进行。