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ACTION SPECTRA FOR ACCUMULATION OF INORGANIC CARBON IN THE CYANOBACTERIUM, Anabaena variabilis
Author(s) -
Ogawa Teruo,
Ogren William L.
Publication year - 1985
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1985.tb03530.x
Subject(s) - anabaena variabilis , action spectrum , phycocyanin , photosynthesis , absorption spectroscopy , carbon fixation , chemistry , photochemistry , absorption (acoustics) , chlorophyll a , carbon fibers , analytical chemistry (journal) , cyanobacteria , materials science , biology , biochemistry , environmental chemistry , optics , physics , genetics , composite number , bacteria , composite material
— Action spectra for accumulation of inorganic carbon were obtained for Anabaena variabilis , strainM–2, in the presence and absence of photosynthetic CO 2 fixation. The action spectrum for inorganic carbon accumulation in the presence of CO 2 fixation showed a peak around 684 nm, corresponding to chlorophyll a absorption in PS 1, while that for CO 2 fixation showed a peak around 630 nm, corresponding to phycocyanin absorption in PS 2. The action spectra obtained in the presence of iodoacetamide or diuron, which inhibit CO 2 fixation, showed two peaks, one at about 684 nm and the other at 630 nm, with the 630 nm peak height 80 to 90% of the 684 nm peak. These results indicate that inorganic carbon transport in A. variabilis can be driven with near equal efficiency by energy derived from absorption in photosystem 1 alone and with energy transferred to PS 1 after absorption by PS 2.