With the growing of Astragalus the content of cell ergastic substance increases gradually, and the effective components accumulate widely in parenchyma cells.
同种黄芪随着生长，细胞后含物的含量逐渐增加；有效成分广泛积累在薄壁细胞。
2
It is well known that the developmental inherent rhythm occurs during the development of secondary vascular tissue. Synchronously, the cell ergastic substance shows dynamic changes.