Exogenous ascorbic acid priming promoted oats seedling growth under Na2SO4 stress

• Qiu-li Dong, 
• Fang-shan Xia, 
• He-xing Ding, 
• Ming-ya Wang, 
• Hui-sen Zhu, 
• Kuan-hu Dong, 
• Xiang Zhao, 
• Li-xia Du