FAR RED REVERSIBILITY OF THE INDUCTION OF RAPID CHLOROPHYLL ACCUMULATION IN DARK GROWN SEEDLINGS
1979
SUMMARY
In leaves of dark grown bean, the degree of reversibility by far red of red-induced induction of rapid chlorophyll accumulation in white light depends upon the duration of a dark period between short red and far red irradiations. Reversibility reaches a maximum for a dark period of about 9 s. It is proposed that this can be explained by interaction of at least two first order processes. The first, with a rate constant at 20 °C of 0.23 s −1, is thought to represent migration of Pfr to sensitive sites. The second, with a rate constant of 0.1 s −1 is the escape from phytochrome control of one of the early steps in the induction process.
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