Institution: | 1. National Tobacco Cultivation, Physiology and Biochemistry Research Centre , Henan Agricultural University , Zhengzhou , China;2. Chongqing Tobacco Company , Chongqing , China;3. Chongqing Tobacco Company , Chongqing , China;4. Enshi Tobacco Company of Hubei Province , Enshi , China;5. National Tobacco Cultivation, Physiology and Biochemistry Research Centre , Henan Agricultural University , Zhengzhou , China |