Endogenous concentrations of indole-3-acetic acid (IAA) and cytokinins were compared to the tendency for plagiogravitropjc growth in rooted stein cuttings of Douglas-fir. A chromatographic method was developed for
the purification and quantitation of trace levels of IAA. Two elutions with reverse-phase high performance liquid
chromatography (HPLC) using a fluorescence detector...