Etude des protéines des blés résistant, Kharkov, et sensible, Selkirk, au cours de l'endurcissement au froid. II. Protéines solubles et protéines des chloroplastes et des membranes
Investigations of quantitative and qualitative changes in protein synthesis in two winter wheat varieties have been made during the early stages of cold hardening. When labelling with 35S is made during the hardening treatment, the incorporation of the tracer into proteins is very low in both varieties. However, if labelling at 22 °C precedes hardening, the hardy variety, Kharkov, shows an increase in the incorporation of 35S into the total soluble proteins, and the rate of synthesis of both chloroplast and membrane proteins is maintained during the hardening process. In the less-hardy Selkirk, a very marked decrease in proteogenesis has been observed.Qualitative studies on the incorporation of 35S have not revealed any changes in specific chloroplast and membrane proteins during early stages of cold hardening of the two varieties of winter wheat.