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Rates of CO2 fixation in response to varying light intensity (A) and intercellular levels of CO2 (B) in three Salsola species s.l., S. masenderanica, S. montana, and S. divaricata, and two C4 Salsoloid-type species, Caroxylon orientale and Xylosalsola richteri. The results show the average from measurements of the response to changes in light (from high to low), and CO2 (from ambient to low, and low to high), from 2–4 separate measurements on branches from different plants.
