https://phys.org/news/2018-08-secret-cell-revival-revealed.html

"Understanding how G0 cells maintain their ability to revive themselves on experiencing favorable conditions is important," says Dr. Kenichi Sajiki, a researcher in the laboratory of Professor Mitsuhiro Yanagida, and the lead author of the paper. For this study, he and his colleagues examined a collection of 3280 fission yeast deletion mutant cell strains that had one of their genes partially or fully deleted.

Fission yeast cells were encouraged to grow and multiply by providing them with necessary nutrients. Their nitrogen supply was subsequently cut off to induce the G0 phase. Once the G0 phase was induced, the yeast cells were maintained in this state for as long as four weeks. At the end of that time, they were restored to their dividing mode by resuming their nitrogen supply.