Regulation of Chloroplast ATP Synthase Modulates Photoprotection in the CAM Plant .

Generally, regulation of cyclic electron flow (CEF) and chloroplast ATP synthase play key roles in photoprotection for photosystems I and II (PSI and PSII) in C3 and C4 plants, especially when CO assimilation is restricted. However, how CAM plants protect PSI and PSII when CO assimilation is restricted is largely known. In the present study, we measured PSI, PSII, and electrochromic shift signals in the CAM plant .