Changes of the CN-resistant Respiration in Callus Cultures of Nicotiana tabacurn during the Period of Differentiation Effect of Cytokinin on the Enhancement of Nitrate Reductase NR Activity in Tobacco Callus Tissues and Wheat Seedlings Studies on the Residual Respiration not Inhibited by KCN Plus Hydroxamic Acid in Tobacco Callus Cultures A Comparative Study on Protein Metabolism During Subculture and Differentiation of Tobacco Callus Studies on the CN-resistant Respiration in Callus of Nicotiana rustica, Gansu Yellow Flower Effects of KCN and NaN3 Pretreatment on the Cyanide-Resistant Respiration in Tobacco Callus A Comparative Study on Detection of the Expression of Alternative Oxidase in Tobacco Callus with the Monoclonal Antibody Against Alternative Oxidase and Antibody Against Synthetic Polypeptide Antibody Dynamic changes in respiratory pathway during the growth and senescence of tobacco callus,gansu yellow flower