Title: A Na2CO3-responsive chitinase gene from Chinese wildrye improve pathogen

Institution addresses: 5 Instutute of Agricultural Biotechnology, Jilin Academy of Agricultural Sciences, 6 Changchun, 130033, P. R. China; 7 Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze 8 River), MOA, Huazhong Agricultural University, Wuhan 430070, P. R. China; 9 Microelement Research Center, College of Resources & Environment, Huazhong 10 Agricultural University, Wuhan 430070, P. R. China; 11 Institute of Industrial Crops, Heilongjiang Academy of Agricultural Sciences, Harbin, P. 12 R. China; 13 # These authors contributed equally to this work. 14