Nonpigment components of the protochlorophyllide photoactive complex: Studies of low-temperature blue-green fluorescence spectraстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Comparative investigation of fluorescence spectra in the blue-green region and excitation fluorescence spectra of green wheat leaves, etiolated wheat leaves and isolated inner etioplast membranes (prolamellar bodies and prothylakoids) was carried out to specify the structure of active protochlorophyllide pigment-protein complex of the inner etioplast membranes. Three bands were found (in the blue region) of the spectra at 420, 443 and 470 nm and a broader green band at 525 nm. Comparison of the emission and excitation spectra allows us to suggest that the main compounds responsible for the blue fluorescence of the etioplast inner membranes are pyridinenucleotides and pterins. The green fluorescence (525 nm) excitation spectra of etiolated samples were identical to the excitation spectrum of the flavins fluorescence. The fact confirms the suggesition that flavins are the constituents of the active protochlorophyllide-protein complex.