Phytochrome control of gene expression in radish seedlings II. Far-red light mediated appearance of the ribulose 1,5-bisphosphate carboxylase and the mRNA for its small subunit

The effect of far-red light on the appearance of the radish ribulose 1,5-bisphosphate carboxylase, its subunits and the mRNA for the small subunit has been studied. The immunological analysis of the accumulation of holoenzyme and small subunit showed that there was no pool of free small subunit either in the etiolated seedlings or in the far-red light illuminated seedlings. The precursor to the small subunit has been identified by immunoprecipitation of the in vitro translation products directed by poly(A)-containing RNA of radish cotyledons. The irradiation of radish cotyledons with far-red light led to the apparent increase of the level of the translatable mRNA for the small subunit.