Abstract:The variations of endogenous hormones in different periods and different parts of Rongfu Laminaria saccharia were analyzed by high performance liquid chromatography coupled with UV detector. It was found that the content of indole-3-acetic acid (IAA) and abscisic acid (ABA) increased significantly in three important periods of L. japonica (juvenile,grow-out,mature). The content of zeatin (ZT) reached the highest in the mature period,and the lowest in the grow-out period. The content of indolebutyric acid (IBA) reached the highest in the grow-out period,and the lowest in the juvenile period. At each development stage,different plant hormones were found at the highest contents in different parts of the L. saccharia blade; IAA showed the highest content in the top,while the highest contents of ZT was found in the middle,and both IBA and ABA were found in the bottom.
