Irradiance dependency of the phytochrome system in cotyledons of mustard (Sinapis alba L.)
SummaryThe irradiance dependency of the phytochrome system in the cotyledons of the mustard seedling has been analyzed, using the steady state level of total phytochrome (Ptot) under continuous far red light as a parameter. The steady state level was found to be proportional to the reciprocal of the irradiance of the far red light. This is in quantitative agreement with a theoretical prediction which is derived from the model of the phytochrome system.