Hi,
One caveat: as mentioned in the other comments,LR will see the and show the adjusted image, but should your file have layers and should you make any further adjustments in LR and then re-open the file in PS -- unless you 'open original' -- you will lose the layers and other settings that you may have changed in PS. So, don't do any further work on a tiff in LR unless you do so in a copy if you want to protect layers, etc.
Jean-Michel