Effects of Exogenous Abscisic Acid on Antioxidant Properties and Cadmium Accumulation of Nicotiana tabacum L. under Cadmium Stress

• ZHANG Liushuang, 
• HAN Jiaqi, 
• XIE Hui, 
• YANG Jinqing, 
• HE Yi, 
• BAO Zhijuan