I've attached a few of the references for bougainvillea plants with respect to the biochemical constituents. Most of them include the parameter chlorophyll content. With respect to stress most of the references are in relation to dust deposition and its effect on different parameters of the plant. as bougainvillea is a roadside plant.
Sorry, but the question is actually impossible to answer. There will be ranges in all species and under different conditions and the question is far to general. Why not measure them yourself? The methods are not too difficult with simple chemistry.