Higher-concentration of Nickel is toxic to the growth of corn. Nickel in the black soil of north china is increasing in recent years and its pollution has been discovered in some regions. NO plays important role in the process of Signal transduction and anti-adversity for plants. Some researches had showed that NO could relieve the toxicity of heavy metals on the crops. It has important significance for studying the mitigative effect of sodium nitroprusside taking as exogenous donor for NO on Nickel toxicit...