作者: Peter Schopfer , Heidemarie Oelze-Karow
DOI: 10.1007/BF00385217
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摘要: The inhibition of hypocotyl lengthening in intact mustard seedlings is controlled by two photosensitive systems which can be experimentally separated. 1. Kinetics the growth response dark after red and far-red irradiation (Figs. 1, 2) demonstrate operation Pfr ground state via a threshold mechanism similar to regulation lipoxygenase synthesis cotyledons (c. f. ref. [27]). This determines duration (Δt) following (Fig. 2). Δt dependent on relative concentration at beginning period half life destruction, but it independent quantum flux density light 4). effect 5 min fully reversed 3). data reveal quantitative relationship between photomorphogenetic response, 6). may explain principle logarithmic correlation percentage phytochrome converted an initial subsequent has also been reported literature. 2. In continuous velocity constant steady “high intensity reaction” shows usual dependence 4, 5), no destruction apparent According Hartmann (ref.[11–13]) this attributed Pfr, case acts through some excited state, P fr * .