The author determined the occurrence of indole-3-acetic acid in sixteen Chinese marine algae collected from the east coast of China with fluorescence spectrophotometry (FS) and wheat coleoptile bioanalysis methods (WCB). The concentration of indole-3-acetic acid (IAA) presented was from 1.1-46.9 ng/g Fw (fresh weight) with FS and 5.3-110.2 ng/g Fw with WCB. The results by the two methods were in the orders of 10-3-103 ng/g Fw reported previously from multiple references.
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