May play a key role in regulating the relative amounts of cyclic and non-cyclic electron flow to meet the demands of the plant for ATP and reducing power. Is involved in nitrate assimilation. H(+) + NADP(+) + 2 reduced [2Fe-2S]-[ferredoxin] = NADPH + 2 oxidized [2Fe-2S]-[ferredoxin] Energy metabolism; photosynthesis. Belongs to the ferredoxin--NADP reductase type 1 family.