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- W2015155634 abstract "The relationship between photosynthetic rate and irradiance was measured for 20 strains of blue-green algae from the genera Anabaena, Aphanizomenon and Oscillatoria. Cells were grown at 20°C under 6:18 light-dark at 30 or 150 µE m-2 s-1. Under high light the mean light saturated rate of photosynthesis (P max) of the Oscillatoria cultures was 14·8 mg O2 mg Chl a -1 h-1, but under low light this was depressed by 42%. Anabaena and Aphanizomenon cultures showed a similar mean P max under high light (13·8 mg O2 mg Chl a -1 h-1), but only a 13% depression of this value under low light. Oscillatoria cultures were more efficient than Anabaena and Aphanizomenon cultures at harvesting low irradiances, as measured by the initial slope of the photosynthesis-irradiance plot. The efficiency of light harvesting at low irradiances increased in Anabaena and Aphanizomenon cultures grown under low light. Oscillatoria cultures on the other hand showed little increase in efficiency when grown under low light. Mainly due to the depression of P max, but also because of increased low light efficiency, the light saturation characteristic I k was lower in low light cultures. In the Oscillatoria cultures the mean I k value decreased from 175 to 100 µE m-2 s-1 and in the Anabaena and Aphanizomenon cultures from 215 to 164 µE m-2 s-1. Probably due to the low short wavelength component of the light source used, little or no inhibition (mean 4·2%) of P max was observed even at irradiances exceeding 700 µE m-2 s-1." @default.
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- W2015155634 date "1982-06-01" @default.
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- W2015155634 title "Photosynthetic characteristics of planktonic blue-green algae: The response of twenty strains grown under high and low light" @default.
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- W2015155634 doi "https://doi.org/10.1080/00071618200650171" @default.
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