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Protochlorophyllide contents and the spectral properties together with photoactivities of native protochlorophyllide forms have been studied in dark-forced stems of 26 and epicotyls or hypocotyls of 9 plant species. The 77 K fluorescence emission spectra show that a form emitting at 629-631 nm is general in these organs. Besides this short-wavelength form,(More)
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