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- W1986244216 abstract "Cells of the unicellular green alga Scenedesmus obtusiusculus (Chod.) were starved of phosphorus for 24, 48, 72 and 96 h, and the decay kinetics of the delayed luminescence from the differently starved cells was monitored for several minutes. Cells starved for 24 h showed similar delayed luminescence decay kinetics and accumulated output of photons as control cells after excitation with white light. Two transient peaks (with several components) in the decay kinetics of delayed luminescence were observed after 48 h of phosphorus starvation but not after 72 or 96 h. The amplitude of the transient peaks varied depending on the length of the excitation period with white light and on the length of the dark period preceding light excitation. High CO2 availability induced no transient peak, whereas low CO2 availability induced a high transient peak. Transient peaks could not be induced by excitation with light of 660 or 680 nm and only a single transient peak developed using 700 nm light. The kinetics of the delayed luminescence was changed, and the accumulated output of photons was decreased when the pH of the medium was changed from 7.2 to 9.5, both in cells starved for phosphorus for 96 h and in controls. The data indicate that a complicated metabolic pattern is involved in the mechanisms giving rise to the observed transient peaks in the delayed luminescence. The main factors may be a reduction in the translocation of trioses from chloroplasts, a concomitant reduction in Calvin cycle activities and changes in the amount of ATP and reducing agents available." @default.
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- W1986244216 date "1986-10-01" @default.
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- W1986244216 title "Transient peaks in the delayed luminescence from Scenedesmus obtusiusculus induced by phosphorus starvation and carbon dioxide deficiency" @default.
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- W1986244216 doi "https://doi.org/10.1111/j.1399-3054.1986.tb01912.x" @default.
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