Abstract
Photosynthetic light acclimation is an important process in plant for the optimal efficiency of photosynthesis, and photosynthesis is the core technology of green energy. However, at present, little is known about molecular mechanisms how to regulate photosynthetic light acclimation response. In this study, a systematic method is proposed to investigate this mechanism through constructing gene regulatory networks from microarray data of Arabidopsis thaliana. A rough gene regulatory network of photosynthetic light acclimation is constructed from the data mining of literature and prediction database. Then the rough gene regulatory network is pruned by microarray data of Arabidopsis thaliana via maximum likelihood system identification and Akaike’s system order detection to obtain a refined gene regulatory network close to the real gene regulatory network of photosynthetic light acclimation. By comparing the gene regulatory networks under PSI-PSII light shift and PSII-PSI light shift, we can identify important transcription factors at different light conditions. Further, the robustness of gene network is also discussed under different light conditions from hub and weak linkage point of view to provide more insight into the mechanism of photosynthesis.