These cells began to devise, then developed into aloin cells through enlargement of volume and vacuolization with the differentiation of metaphloem and metaxylem.

在后生韧皮部部发育成熟过程中，这些细胞积逐渐增，并液泡化，发育成薄壁细胞（芦荟素细胞），位于筛管外侧。