Cadmium( Cd) can be generated by mining or industrial practice,and it has become a serious threat to living environment and health of human beings. This paper systematically studied the function of NO,generated by ascorbic acid( Vc) along with nitrite( NO-2) under acidic conditions,in alleviating Cd stress of maize( Zea mays L.) seedlings. The results showed that NO-2derived chemically synthesized NO can significantly improve Cd tolerance of maize seedlings that were cultured hydroponicly by a dose-dependen...