C. elegans germline stem cells become quiescent under starved conditions, and this quiescence maintains the stem cell state even in the absence of GLP-1/Notch signaling, which is otherwise essential for stem cell maintenance.
JNK pathway activity induces spermatogonial dedifferentiation under challenging conditions to maintain the germline stem cell pool and to endow it with potentially fitter cells that have increased proliferation.
Post-transcriptional control by YTHDC2 is required to turn off the mitotic proliferation program and facilitate proper expression of the meiotic program to allow a clean cell fate transition in the germline stem cell lineage.
Morphological and functional rejuvenation upon exit from adult reproductive diapause in C. elegans is independent of germline signaling, but instead involves somatic nucleolar activation and expansion of the RNA pool.
De novo transcriptome assembly and comprehensive characterization of gene expression in proliferating cells of regeneration-capable flatworm Macrostomum lignano advance this organism as a powerful model for stem cell research.