Lu Zhou, Shan Gao, Wenting Yang, Songcui Wu, Li Huan, Xiujun Xie, Xulei Wang, Senjie Lin, Guangce Wang
Unlike in terrestrial and freshwater ecosystems, light fields in oceans fluctuate due to both horizontal current and vertical mixing. Diatoms thrive and dominate the phytoplankton community in these fluctuating light fields. However, the molecular mechanisms that regulate diatom acclimation and adaptation to light fluctuations are poorly understood. Here, we performed transcriptome sequencing, metabolome profiling, and 13C-tracer labeling on the model diatom Phaeodactylum tricornutum. The diatom acclimated to constant light conditions was transferred to six different light conditions, including constant light (CL5d), short-term (1 h) high light (sHL1h), and short-term (1 h) and long-term (5 d) mild or severe light fluctuation conditions (mFL1h, sFL1h, mFL5d, sFL5d) that mimicked land and ocean light levels...
September 23, 2022: Plant Physiology