IAU Symposium "Star-disk interaction in young stars" is a tribute to Claude Bertout’s pioneering contributions to our understanding of the physics of young stars. In a series of papers published in the late 80’s, Bertout and collaborators demonstrated that the UV and IR excesses exhibited by many low mass young stars could be consistently accounted for by assuming the presence of an accretion disk. Disk models aimed at reproducing the spectral energy distribution of young stars additionally suggested truncated inner disks, and the study of photometric variability provided the first evidence for magnetically-channelled accretion onto the star. Nearly 20 years later, IAU Symposium 243 is intended to review our current understanding of the magnetopheric accretion/ejection process in young stars.