Live images show that xbp1/atf6(RNAi) planarians in starved conditions form a minimal blastema when compared to controls while at the feeding condition most of them can regenerate as controls. The remaining planarians in the starved condition are dead by the time point of regeneration shown. In the feeding condition, the remaining planarians at 8-10dR are either dead (13/145) or have a tiny blastema and died or regenerated later (40/145) while at 21-27dR are dead. 