Recommended reference genes for <i>Lyngbya</i>, <i>Nostoc</i> and <i>Synechocystis</i>, under the conditions tested.

*CL – continuous light; LD – light/dark regimen; N+ – medium with combined nitrogen; N− – medium without combined nitrogen. **Genes recommended (+), not recommended (−) or not selected after preliminary analysis (ns). ***Calculation performed pooling data from cells grown in both media and in the same light regimen.