【Abstract】 The effects of water stress on the photosynthesis of sugarcane leaves were studied by using modulated chlorophyll fluorometer. The decrease of Fv/Fm,Fv/Fo, ΔFv/Fo, ΔFv/Ft values and photochemical quantum yield under water stress suggested that the primary light energy conversion of PSⅡ, photosynthetic electron transport and the potential photosynthetic activities had been inhibited.更多还原