Temperature dependence of delayed fluorescence induction curve transients

The temperature dependence of delayed millisecond fluorescence (DF) inducti on curve transients was investigated. The transients were obtained by keepi ng intact maize leaf segments in the dark for 30 to 300 s before illuminati on. The temperature dependence of DF induction revealed abrupt changes in a ctivation energy of the recombination process. Those changes highly overcom e the lowest energy barriers for certain types of chemical reactions, imply ing significant possible alterations in the DF mechanism itself. On the oth er hand, the particular transients responses expressed some specifities. Bo th the electrochemical gradient controlled changes, and the temperature ind uced changes contibute to it.