Benzoapyrene (B[a]P) pollution poses a threat to the environment and food chain consequently human health. However, alleviation of harmful effects B[a]P in perennial ryegrass ( Lolium perenne L.) by application exogenous nitric oxide (NO) has been ignored. Thus, this paper sodium nitroprusside (SNP, NO donor) on growth, photosynthetic fluorescence characteristics, antioxidant enzyme activity ex...