Ceratodon purpureus GG1 Annotation Transcriptome. Sample originally collected in Gross Gerungs, Austria. Homogenized protonema tissue grown in sterile conditions for 7 days on cellophaned standard BCDA media supplemented with 0.5% sucrose in growth chamber with 18 hr light (at 25 degrees C) and 6 h dark (at 21 degrees C).