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。

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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.

众所周知，树木次生维管组织的发育具有内在的节律性，与此同时维管组织的细胞内含物也会发生动态变化。

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