Effects of drought stress on protective enzyme activity and osmotic regulatory substances in desert plant Haloxylon ammodendron seedlings

• WANG Yuanyan, 
• CHAI Chengwu, 
• JI Yongfu, 
• WANG Fanglin, 
• ZHAO Peng, 
• FU Guiquan, 
• TANG Weidong, 
• XIAO Bin