[Objective] The research aimed to study the effects of rural highway traffic on physiological characteristics of O.sativa L..[Method] Through the potted experiment of different distance to road,net photosynthetic rate(Pn),stoma-opening degree(Gs),intercellular CO2 concentration(Ci),transpiration rate(Tr),cytoplasmic membrane permeability,free proline content and soluble sugar content in O.sativa L.leaves were studied.[Result] The results showed that the rural highway traffic had different effects on the potted O.sativa L.of distance to ...