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Net CO2 balance during 12-h light (white circles) and 12-h dark periods (black circles) and net CO2 uptake during 12-h dark periods (white triangles) during the life cycle of M. crystallinum grown under nonsaline conditions in hydroponic solution. Results from experiments with three plants (A, B, and C) are shown. In B and C, nutrient solutions were not replaced after days 69 and 36, respectively. Measurements are of whole, intact shoots (stem, leaves, and branches).
