Chloroplast movement is influenced by

Chloroplast movement is influenced by light exposure. Light-induced changes in the cellular distribution or orientation of chloroplasts have been observed in nearly all green plants including algae, mosses, ferns, and angiosperms. Under low light conditions, chloroplasts accumulate along the cell walls that are perpendicular to the incident light. Under high light conditions, they accumulate along the walls that are parallel to the incident light. These are the regions of plant leaf cells where internal fluence rates of light are the highest and lowest, respectively and it is believed likely that the lightinduced chloroplast movements serve an adaptive function.