The purpose of this study was to determine the effect of the interaction of concentrations and several types of auxin on the in-vitro induction of orchid plant roots. This research was carried out at the Biotechnology Laboratory of the Faculty of Agriculture, Islamic University of Riau, Jalan Kaharudin Nasution KM 11 No. 113 Air Cold Village, Bukit Raya District, Pekanbaru City. This research w…